4,251 results match your criteria Journal of sports sciences[Journal]


Validating the Sedentary Sphere method in children: Does wrist or accelerometer brand matter?

J Sports Sci 2019 Apr 23:1-9. Epub 2019 Apr 23.

a Physical Activity Exchange, Research Institute of Sport and Exercise Sciences , Liverpool John Moores University , Liverpool , UK.

This study aimed to validate the Sedentary Sphere posture classification method from wrist-worn accelerometers in children. Twenty-seven 9-10-year-old children wore ActiGraph GT9X (AG) and GENEActiv (GA) accelerometers on both wrists, and activPAL on the thigh while completing prescribed activities: five sedentary activities, standing with a phone, walking (criterion for all 7: observation) and 10-min free-living play (criterion: activPAL). In an independent sample, 21 children wore AG and GA accelerometers on the non-dominant wrist and activPAL for two days of free-living. Read More

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https://www.tandfonline.com/doi/full/10.1080/02640414.2019.1
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http://dx.doi.org/10.1080/02640414.2019.1605647DOI Listing
April 2019
1 Read

The impact of impairment on kinematic and kinetic variables in Va'a paddling: Towards a sport-specific evidence-based classification system for Para Va'a.

J Sports Sci 2019 Apr 22:1-9. Epub 2019 Apr 22.

a Department of Sport and Health Sciences , The Swedish School of Sport and Health Sciences (GIH) , Stockholm , Sweden.

Para Va'a is a new Paralympic sport in which athletes with trunk and/or leg impairment compete over 200 m. The purpose of this study was to examine the impact of impairment on kinematic and kinetic variables during Va'a ergometer paddling. Ten able-bodied and 44 Para Va'a athletes with impairments affecting: trunk and legs (TL), legs bilaterally (BL) or leg unilaterally (UL) participated. Read More

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http://dx.doi.org/10.1080/02640414.2019.1606763DOI Listing

Day-level sedentary pattern estimates derived from hip-worn accelerometer cut-points in 8-12-year-olds: Do they reflect postural transitions?

J Sports Sci 2019 Apr 19:1-11. Epub 2019 Apr 19.

d Institute for Physical Activity and Nutrition (IPAN), School of Exercise and Nutrition Sciences , Deakin University , Geelong , Australia.

Improving sedentary measurement is critical to understanding sedentary-health associations in youth. This study assessed agreement between the thigh-worn activPAL and commonly used hip-worn ActiGraph accelerometer methods for assessing sedentary patterns in children. Both devices were worn by 8-12-year-olds (N = 195) for 4. Read More

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http://dx.doi.org/10.1080/02640414.2019.1605646DOI Listing

Postural balance and rifle stability in a standing shooting position after specific physical effort in biathletes.

J Sports Sci 2019 Apr 19:1-7. Epub 2019 Apr 19.

a Department of Physiology , Institute of Sport - National Research Institute , Warsaw , Poland.

The aim of the study was to evaluate the effect of maximal specific physical effort on postural balance and rifle stability in biathletes in a standing shooting position. The study included 10 junior elite biathletes. The measurements were taken with the Vicon system and AMTI force platform. Read More

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http://dx.doi.org/10.1080/02640414.2019.1603136DOI Listing

A shorter cricket pitch improves decision-making by junior batters.

J Sports Sci 2019 Apr 19:1-8. Epub 2019 Apr 19.

a School of Sport, Exercise and Health Sciences , Loughborough University , Leicestershire , UK.

This study sought to determine whether playing on a shorter cricket pitch would lead batters to make more appropriate decisions about whether to play front foot or back foot shots. Based on an analysis of the shots played by top order batters against seam bowling in county under-10 matches, an age-specific "good length" region between 5.0 yards and 6. Read More

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http://dx.doi.org/10.1080/02640414.2019.1606760DOI Listing

Accelerometer and self-reported measures of sedentary behaviour and associations with adiposity in UK youth.

J Sports Sci 2019 Apr 19:1-7. Epub 2019 Apr 19.

a Movement Behaviours, Health and Wellbeing Research Group, Department of Sport and Physical Activity , Edge Hill University , Ormskirk , UK.

This study used accelerometer and self-report measures of overall sedentary time (ST) and screen time behaviours to examine their respective associations with adiposity among UK youth. Participants (Year groups 5, 8, and 10; n=292, 148 girls) wore the SenseWear Armband Mini accelerometer for eight days and completed the Youth Activity Profile, an online report tool designed to estimate physical activity and ST.Stature, body mass and waist circumference were measured to classify adiposity outcomes (overweight/obese and central obesity). Read More

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https://www.tandfonline.com/doi/full/10.1080/02640414.2019.1
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http://dx.doi.org/10.1080/02640414.2019.1605649DOI Listing
April 2019
1 Read

The direct and indirect effects of motor competence on adolescents' mental health through health-related physical fitness.

J Sports Sci 2019 Apr 15:1-7. Epub 2019 Apr 15.

a Department of Kinesiology , University of Texas at Arlington , Arlington, TX , USA.

Mental health is an important public health issue and up to one in five youth experience mental health problems. The primary purpose of this study was to examine the relationship among motor competence, health-related physical fitness and mental health outcomes in adolescents. A secondary goal was to test the direct and indirect effects of motor competence on adolescents' mental health through health-related physical fitness. Read More

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http://dx.doi.org/10.1080/02640414.2019.1605652DOI Listing

Time courses of emotions experienced after a mountain ultra-marathon: Does emotional intelligence matter?

J Sports Sci 2019 Apr 11:1-9. Epub 2019 Apr 11.

a Sport sciences department , University of Bourgogne Franche-Comté , Dijon , France.

This research examined the time courses of emotions in sport settings (anxiety, dejection, anger, happiness, excitement) experienced by mountain ultra-marathon (MUM) runners within the month following a demanding MUM race and the role of emotional intelligence (EI) in these time courses. A six-wave one-month longitudinal design was used with one measurement point within two days before the race to measure EI and five time points within the month following the race to assess emotions experienced among a sample of 29 runners. Results of multilevel growth curve analyses showed significant linear decreases of dejection and anxiety and a significant linear increase of anger. Read More

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http://dx.doi.org/10.1080/02640414.2019.1597827DOI Listing

Rehabilitation and nutrition protocols for optimising return to play from traditional ACL reconstruction in elite rugby union players: A case study.

J Sports Sci 2019 Apr 9:1-10. Epub 2019 Apr 9.

c Department of Neurobiology, Physiology, and Behaviour , University of California Davis , Davis, CA , USA.

Current nutrition and exercise focus during rehabilitation periods has been on reducing muscle atrophy associated with immobilisation. This case report outlines a best practice anterior cruciate ligament (ACL) rehabilitation programme undertaken by two professional rugby athletes, with the addition of an evidence-based supplementation (gelatine and vitamin C) and exercise protocol focused on collagenous tissue. Both players ruptured their left ACL and were repaired with a traditional hamstring graft. Read More

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https://www.tandfonline.com/doi/full/10.1080/02640414.2019.1
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http://dx.doi.org/10.1080/02640414.2019.1594571DOI Listing
April 2019
6 Reads

Validity of equations for estimating aerobic fitness in Mexican youth.

J Sports Sci 2019 Apr 9:1-8. Epub 2019 Apr 9.

b Health Care Department , Universidad Autónoma Metropolitana unidad Xochimilco , México D.F. , México.

The purpose of this study was to evaluate the validity of prediction equations for estimating maximal oxygen uptake (VO) based on the PACER test and different adiposity indicators in Mexican youth. A convenience sample of youth aged 9-18 years from schools in Mexico City was recruited. VO was evaluated with a laboratory exercise test on a treadmill and using a gas analyser and with the 20-m PACER test guidelines. Read More

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https://www.tandfonline.com/doi/full/10.1080/02640414.2019.1
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http://dx.doi.org/10.1080/02640414.2019.1601149DOI Listing
April 2019
5 Reads

Perceptual changes to progressive resistance training with and without blood flow restriction.

J Sports Sci 2019 Apr 9:1-8. Epub 2019 Apr 9.

e Department of Health, Exercise Science, and Recreation Management, Kevser Ermin Applied Physiology Laboratory , The University of Mississippi , University , MS , USA.

The purpose was to examine changes in the perceptual responses to lifting a very low load (15% one repetition maximum (1RM)) with and without (15/0) different pressures [40% (15/40) and 80% (15/80) arterial occlusion pressure] and compare that to traditional high load (70/0) resistance exercise. Ratings of perceived exertion (RPE) and discomfort were measured following each set of exercise. In addition, resting arterial occlusion pressure was measured prior to exercise. Read More

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http://dx.doi.org/10.1080/02640414.2019.1599315DOI Listing
April 2019
1 Read

The influence of biological sex and cuff width on muscle swelling, echo intensity, and the fatigue response to blood flow restricted exercise.

J Sports Sci 2019 Apr 4:1-9. Epub 2019 Apr 4.

a Department of Health, Exercise Science, and Recreation Management, Kevser Ermin Applied Physiology Laboratory , The University of Mississippi , University , MS , USA.

The purpose was to determine if the muscle swelling, echo intensity, and fatigue responses to blood flow restriction differs based on cuff width (Experiment 1), applied pressure (Experiment 2), and sex. Ultrasound of muscle was taken before and after exercise. In Experiment 1 (n = 96), men swelled more than women and more with a narrow cuff than a wide cuff (0. Read More

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http://dx.doi.org/10.1080/02640414.2019.1599316DOI Listing
April 2019
2 Reads

Menstrual cycle alters training strain, monotony, and technical training length in young.

J Sports Sci 2019 Apr 3:1-7. Epub 2019 Apr 3.

c Department of Physical Education , Federal University of Lavras , Lavras , Brazil.

The menstrual cycle (MC) phases carry to several psychophysiological alterations; however, no study has investigated the impact of MC phases on training load or technical training. In the present study, we investigated the effect of the follicular phase (FP), ovulatory phase (OP), and luteal phase (LP) on training load and technical training in young athletes. Twelve female athletes performed regular daily training sessions with the rating of perceived exertion (RPE) and duration being registered every session. Read More

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http://dx.doi.org/10.1080/02640414.2019.1597826DOI Listing

The effect of deloading tape on medial gastrocnemius muscle fascicle behaviour during dynamic exercise.

J Sports Sci 2019 Apr 2:1-10. Epub 2019 Apr 2.

a School of Health, Medical and Applied Sciences , Central Queensland University , Bundaberg , Australia.

This study examined the effect of diamond deloading tape on medial gastrocnemius (MG) muscle behaviour during exercise in healthy adults (n = 27). A randomised cross-over trial assessed the effect of tape (no-tape, sham-tape and deload-tape) on ankle and MG fascicle kinematics during three heel raise-lower exercises [double leg (DL), single leg (SL) and loaded single leg (LSL)]. There was no effect of tape on standing fascicle length (FL) or pennation angle (PA), or ankle or knee joint angle. Read More

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http://dx.doi.org/10.1080/02640414.2019.1600225DOI Listing

Frequent sit-to-stand transitions and several short standing periods measured by hip-worn accelerometer are associated with smaller waist circumference among adults.

J Sports Sci 2019 Apr 2:1-9. Epub 2019 Apr 2.

a The UKK Institute for Health Promotion Research , Tampere , Finland.

This cross-sectional study analysed the association of sedentary behaviour (SB) and standing with waist circumference. Finnish adults aged 30-75 years from a sub-sample of population-based Health 2011 Study used a hip-worn tri-axial accelerometer (Hookie AM20, Traxmeet, Ltd, Espoo, Finland) for seven days. Those 1405 participants (57% women) who used accelerometer at least four days, minimum of 10 hours/day, were included. Read More

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http://dx.doi.org/10.1080/02640414.2019.1598251DOI Listing
April 2019
1 Read

The impact of physiological load on anticipation skills in badminton: From testing to training.

J Sports Sci 2019 Mar 30:1-8. Epub 2019 Mar 30.

a Carnegie School of Sport , Leeds Beckett University , Leeds , UK.

Research remains unclear on the impact of physiological load on perceptual-cognitive skills in sport. Moreover, no study has examined the training of perceptual-cognitive skills under physiological load. The current study comprised two phases. Read More

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http://dx.doi.org/10.1080/02640414.2019.1596051DOI Listing

Patellofemoral pain, body morphology and alignment in female pubertal dancers: One-year follow-up.

J Sports Sci 2019 Apr 1:1-9. Epub 2019 Apr 1.

d Orthopedic Rehabilitation Department , Sheba Medical Center , Tel-Hashomer , Israel.

The aim of this study was to assess changes in body morphology, anatomical alignment and prevalence of patellofemoral pain (PFP) in young female dancers along one year of pubertal growth, and to identify the risk factors related to PFP in these young dancers. Both legs of 60 dancers were evaluated during grade 7 and again after 1-year. At each of these points in time, the dancers were interviewed concerning their background, and anthropometric measurements, lower-limb physical examinations and knee ultrasound scans were performed. Read More

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https://www.tandfonline.com/doi/full/10.1080/02640414.2019.1
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http://dx.doi.org/10.1080/02640414.2019.1586076DOI Listing
April 2019
8 Reads

Dynamic sitting: Measurement and associations with metabolic health.

J Sports Sci 2019 Mar 30:1-9. Epub 2019 Mar 30.

a Department of Social Medicine/CAPHRI Care and Public Health Research Institute , Maastricht University , Maastricht , The Netherlands.

Dynamic sitting, such as fidgeting and desk work, might be associated with health, but remains difficult to identify out of accelerometry data. We examined, in a laboratory study, whether dynamic sitting can be identified out of triaxial activity counts. Among 18 participants (56% men, 27. Read More

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http://dx.doi.org/10.1080/02640414.2019.1592800DOI Listing
March 2019
1 Read

Influence of the composition of artificial turf on rotational traction and athlete biomechanics.

J Sports Sci 2019 Mar 28:1-8. Epub 2019 Mar 28.

a Human Performance Lab, Faculty of Kinesiology , University of Calgary , Calgary , Canada.

Artificial turf advances have enabled surfaces to behave like natural grass, however, debate remains as to whether artificial turf is as safe as natural grass. To reduce injury risk, sport surfaces should have low rotational traction with artificial surfaces having a potential advantage as components can be manipulated to change surface properties and traction. The purpose of this study was to investigate the influence that different components of artificial turf have on rotational traction and athlete lower extremity joint loading. Read More

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http://dx.doi.org/10.1080/02640414.2019.1598923DOI Listing

Creating performance benchmarks for the future elites in speed skating.

J Sports Sci 2019 Mar 27:1-8. Epub 2019 Mar 27.

a Center for Human Movement Sciences , University Medical Center Groningen, University of Groningen , Groningen , The Netherlands.

Sports performance benchmarks useful to select and guide future elites are limited in literature. The present study introduces a method to enable comparison between sports performance of different generations and creates performance benchmarks for the future elites in speed skating. 1500 m Season Best Times (SBT) of Dutch skaters (1043 females, 1812 males, age 13-26 years), who competed in at least six seasons between 1993 and 2013, were corrected for the prevailing world record (WR): rSBT=(SBT/WR)*100%. Read More

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http://dx.doi.org/10.1080/02640414.2019.1593306DOI Listing

Perceptual-cognitive expertise when refereeing the scrum in rugby union.

J Sports Sci 2019 Mar 25:1-9. Epub 2019 Mar 25.

b College of Life and Environmental Sciences , University of Exeter , Exeter , UK.

Compared to sports performers, relatively little is known about how sports officials make decisions at a perceptual-cognitive level. Thus, this study examined the decision-making accuracy and gaze behaviour of rugby union referees of varying skill levels while reviewing scrum scenarios. Elite (n = 9) and trainee (n = 9) referees, as well as experienced players (n = 9), made decisions while watching ten projected scrum clips and wearing a mobile eye-tracker. Read More

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http://dx.doi.org/10.1080/02640414.2019.1594568DOI Listing
March 2019
1 Read

Happiness and counterfactual thinking at the 2016 Summer Olympic Games.

J Sports Sci 2019 Mar 23:1-8. Epub 2019 Mar 23.

a School of Psychology , University of Wollongong , Wollongong , Australia.

The purpose of this study was to investigate potential differences in emotional expression and counterfactual thought between bronze and silver Olympic medallists. In Study 1, 468 photographs (156 gold medallists, 156 silver medallists, 156 bronze medallists) were obtained of Olympic medal winners standing on the podium at the 2016 Summer Olympic Games, and 20 students rated the level of expressed happiness in each photograph. The students were blind to the outcome of the event and an average score for each photograph was used in data analysis. Read More

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http://dx.doi.org/10.1080/02640414.2019.1592803DOI Listing

Children's metabolic expenditure during object projection skill performance: New insight for activity intensity relativity.

J Sports Sci 2019 Mar 22:1-7. Epub 2019 Mar 22.

b Department of Physical Education , University of South Carolina , Columbia , SC , USA.

Objective: To examine children's energy expenditure (EE) during object projection skill performance at three intensity intervals.

Methods: Children's (42, Mage = 8.1) average metabolic equivalents of task (METs) were calculated using a COSMED K4b2 while they repeatedly performed blocks of kicking, throwing (overhand), and striking (two-handed) during 6, 12, and 30-s interval conditions. Read More

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http://dx.doi.org/10.1080/02640414.2019.1592801DOI Listing
March 2019
2 Reads

Effects of periodic carbohydrate ingestion on endurance and cognitive performances during a 40-km cycling time-trial under normobaric hypoxia in well-trained triathletes.

J Sports Sci 2019 Mar 21:1-11. Epub 2019 Mar 21.

d Institute of Sports Sciences , University of Taipei , Taipei , Taiwan.

The purpose of this study was to examine CHO ingestion on a cognitive task using a field-simulated time-trial (TT) under hypoxia in well-trained triathletes. Ten male triathletes (age: 22.1 ± 1. Read More

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http://dx.doi.org/10.1080/02640414.2019.1595338DOI Listing

Validity and reliability of a low-cost dynamometer to assess maximal isometric strength of upper limb.

J Sports Sci 2019 Mar 21:1-7. Epub 2019 Mar 21.

d Centre for Sport Studies, King Juan Carlos University , Madrid , Spain.

Muscle imbalance and deficit are key parameters for guiding rehabilitation and sports sessions and avoiding injuries. However, the high cost and non-portable nature of most instruments employed for muscle strength assessment frequently hamper an affordable evaluation in field conditions. This study evaluated the validity and reliability of a low-cost digital dynamometer to assess the maximal isometric strength of upper limb muscles. Read More

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http://dx.doi.org/10.1080/02640414.2019.1594570DOI Listing

Maturity status effects on torque and muscle architecture of young soccer players.

J Sports Sci 2019 Mar 21:1-10. Epub 2019 Mar 21.

a School of Physical Education, Physiotherapy and Dance, Exercise Research Laboratory , Universidade Federal do Rio Grande do Sul , Porto Alegre , Brazil.

This study investigated the effects of maturity status on knee extensor torque and vastus lateralis architecture of young soccer players. Thirty-four males aged 13-18 years were divided into two groups: pubescent (PUB, n = 15) and postpubescent (POSP, n = 19). Torque by angle interaction was established for absolute [F(2. Read More

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http://dx.doi.org/10.1080/02640414.2019.1589908DOI Listing

Normative fat-free mass index values for a diverse sample of collegiate female athletes.

J Sports Sci 2019 Mar 20:1-5. Epub 2019 Mar 20.

a Applied Physiology Laboratory, Department of Exercise and Sport Science , University of North Carolina , Chapel Hill , NC , USA.

The purpose of this study was to establish normative fat-free mass index (FFMI) ranges in collegiate female athletes. A sample of 266 female athletes (Mean±SD; Age: 19.7 ± 1. Read More

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http://dx.doi.org/10.1080/02640414.2019.1591575DOI Listing
March 2019
1 Read

Network-based centrality measures and physical demands in football regarding player position: Is there a connection? A preliminary study.

J Sports Sci 2019 Mar 20:1-8. Epub 2019 Mar 20.

a Faculty of Education and Sport , University of the Basque Country (UPV/EHU) , Vitoria-Gasteiz , Spain.

This study's main objective is to analyse the relationship between network-based centrality measures and physical demands in elite football players. Thirty-six matches from La Liga, the Spanish league, were analysed in the 2017/18 season. The analysis of networks formed by team players passing the ball included: degree-prestige (DP), degree-centrality (DC), betweenness-centrality (BC), page-rank (PRP) and closeness-centrality (IRCC). Read More

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http://dx.doi.org/10.1080/02640414.2019.1589919DOI Listing

"How are running shoes assessed? A systematic review of characteristics and measurement tools used to describe running footwear".

J Sports Sci 2019 Mar 17:1-13. Epub 2019 Mar 17.

b Centre for Health, Activity and Rehabilitation Research, School of Physiotherapy , University of Otago , Dunedin , New Zealand.

Background: Many footwear characteristics are argued as risk factors for running related injuries (RRI). Several footwear assessment tools are available; however, their use in studies of RRI is unknown.

Objective: This systematic review evaluated the characteristics and methods of assessing footwear in studies of RRI. Read More

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http://dx.doi.org/10.1080/02640414.2019.1578449DOI Listing

Sport supplement use predicts doping attitudes and likelihood via sport supplement beliefs.

J Sports Sci 2019 Mar 12:1-7. Epub 2019 Mar 12.

b School of Sport, Exercise and Rehabilitations , University of Birmingham , Birmingham , UK.

The aim of this study was to examine: 1) whether sport supplement use is related to doping and 2) whether sport supplement beliefs mediated this relationship. In Study 1, athletes (N = 598), completed measures of sport supplement use, sport supplement beliefs, and doping attitudes. In Study 2, athletes (N = 475) completed measures of sport supplement use, sport supplement beliefs, and doping likelihood. Read More

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http://dx.doi.org/10.1080/02640414.2019.1589920DOI Listing

Accuracy of Actigraph inclinometer to classify free-living postures and motion in adults with overweight and obesity.

J Sports Sci 2019 Mar 7:1-9. Epub 2019 Mar 7.

a Exercise and Health Laboratory, CIPER, Faculdade de Motricidade Humana , Universidade de Lisboa , Lisbon , Cruz-Quebrada , Portugal.

Sedentary behaviour (SB) is an independent health risk-factor and interrupting SB seems to be beneficial. SB is both defined by posture and intensity, thus objective measurement of postures remains a priority. The ActivPAL inclinometer (AP) has been used as a reference for postural estimation, but information on the validity of the Actigraph inclinometer (AG) is scarce. Read More

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https://www.tandfonline.com/doi/full/10.1080/02640414.2019.1
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http://dx.doi.org/10.1080/02640414.2019.1586281DOI Listing
March 2019
9 Reads

The influence of match phase and field position on collective team behaviour in Australian Rules football.

J Sports Sci 2019 Mar 5:1-9. Epub 2019 Mar 5.

a Institute for Health and Sport (IHES) , Victoria University , Melbourne , Australia.

This study investigated the influence of match phase and field position on collective team behaviour in Australian Rules football (AF). Data from professional male athletes (years 24.4 ± 3. Read More

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http://dx.doi.org/10.1080/02640414.2019.1586077DOI Listing
March 2019
1 Read

Estimation of the maximal lactate steady state in postmenopausal women.

J Sports Sci 2019 Mar 5:1-9. Epub 2019 Mar 5.

a Studies, Research and Sport Medicine Centre (CEIMD) , Government of Navarre , Pamplona , Spain.

This study aimed to estimate the maximal lactate steady-state velocity (MLSS) from non-invasive bloodless variables and/or blood lactate-related thresholds (BLTs) measured during an Incremental submaximal Shuttle Test (IST), and to determine whether the addition of a Constant Velocity Test (CVT) could improve the estimation. Seventy-five postmenopausal women conducted an IST to determine several BLTs and bloodless variables, and two to seven CVTs to determine MLSS. Determined BLTs were conventionally used lactate threshold (LT) measured either visually (LT) or mathematically (LE), and 0. Read More

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http://dx.doi.org/10.1080/02640414.2019.1586814DOI Listing
March 2019
1 Read

The inflammatory response to a wheelchair half-marathon in people with a spinal cord injury - the role of autonomic function.

J Sports Sci 2019 Mar 5:1-8. Epub 2019 Mar 5.

b Department of Rehabilitation Medicine , Wakayama Medical University , Wakayama , Japan.

This study investigates the relationship between autonomic function and the inflammatory response to a wheelchair half-marathon in people with a spinal cord injury (SCI). Seventeen wheelchair athletes with a cervical SCI (CSCI, N = 7) and without CSCI (NON-CSCI, N = 10) participated in a wheelchair half-marathon. Blood was taken prior, post and 1 h post-race to determine the concentrations of adrenaline, noradrenaline, extracellular heat shock protein 72 (eHsp72) and interleukin-6 (IL-6). Read More

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http://dx.doi.org/10.1080/02640414.2019.1586296DOI Listing
March 2019
2.246 Impact Factor

Association of serotoninergic pathway gene variants with elite athletic status in the Polish population.

J Sports Sci 2019 Mar 5:1-8. Epub 2019 Mar 5.

c Department of Sport's Theory , Jozef Pilsudski University of Physical Education in Warsaw , Warsaw , Poland.

Genetic factors are known to influence sport performance. The aim of the present study was to assess genetic variants in genes coding for proteins potentially modulating activity of brain emotion centres in a group of 621 elite athletes (212 endurance, 183 power and 226 combat athletes) and 672 sedentary controls. Ten statistically significant variants were identified in genes encoding elements of serotoninergic, catecholaminergic and hypothalamic-pituitary-adrenal systems in different sport groups. Read More

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http://dx.doi.org/10.1080/02640414.2019.1583156DOI Listing

The prevalence of urinary incontinence in nulliparous female sportswomen: A systematic review.

J Sports Sci 2019 Mar 1:1-10. Epub 2019 Mar 1.

b Cobián Clinic , Corunna , Spain.

Urinary incontinence is the complaint of involuntary loss of urine and is a social and hygienic problem. While pregnancy and delivery have been described as etiological factors, observational studies show that urinary incontinence is also prevalent in nulliparous female athletes. Therefore, the general belief that physically fit women have stronger pelvic floor muscles preventing them from developing urinary incontinence may be questioned. Read More

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http://dx.doi.org/10.1080/02640414.2019.1585312DOI Listing
March 2019
2 Reads

Implicit and explicit attitudes towards sport among young elite athletes with high versus low burnout symptoms.

J Sports Sci 2019 Mar 1:1-8. Epub 2019 Mar 1.

a Department of Sport, Exercise and Health , University of Basel , Basel , Switzerland.

The development of cynical attitudes towards elite sport is a core symptom of athlete burnout and has been associated with dropout from elite sport. To date, this phenomenon has mainly been studied by investigating explicit attitudes towards sport, whereas athletes' automatic evaluations (i.e. Read More

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http://dx.doi.org/10.1080/02640414.2019.1585313DOI Listing
March 2019
3 Reads

Differences in maturity, morphological and physical attributes between players selected to the primary and secondary teams of a Portuguese Basketball elite academy.

J Sports Sci 2019 Mar 1:1-9. Epub 2019 Mar 1.

a Faculty of Physical Education and Sport , Universidade Lusófona , Lisbon , Portugal.

The present study aims (i) to compare the maturational, morphological and fitness attributes of young basketball players of primary and secondary teams of an elite basketball academy, and (ii) to identify the set of morphological and fitness attributes which better discriminate the players from the two teams. A total of 116 male basketball players of an elite basketball academy were divided into primary (team A) and secondary (team B) teams in two age groups (U-14 and U-16). All the players were evaluated during two consecutive seasons and data related to players' practice experience, maturational, morphological and fitness attributes were collected at the beginning of the competition period. Read More

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https://www.tandfonline.com/doi/full/10.1080/02640414.2019.1
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http://dx.doi.org/10.1080/02640414.2019.1585410DOI Listing
March 2019
3 Reads

Workload and injury incidence in elite football academy players.

J Sports Sci 2019 Mar 1:1-6. Epub 2019 Mar 1.

d The Football Exchange, Research Institute for Sport and Exercise Sciences , Liverpool John Moores University , Liverpool , UK.

The aim of this study was to prospectively analyse the relationship between workloads and injury in elite football academy players. Elite football academy players (n = 122) from under-19 (U19) and under-21 (U21) of a professional football team competing in UEFA European Cups were followed during 5 seasons. Injuries were collected and absolute workload and workload ratios (4-weeks, 3-weeks, 2-weeks and week-to-week) calculated using a rolling days method with the help of the session Rate of Perceived Exertion. Read More

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http://dx.doi.org/10.1080/02640414.2019.1584954DOI Listing
March 2019
1 Read

Multi-joint rate of force development testing protocol affects reliability and the smallest detectible difference.

J Sports Sci 2019 Feb 27:1-12. Epub 2019 Feb 27.

a School of Sport , Ulster University , Newtownabbey , N. Ireland.

Isometric tests have been used to assess rate of force development (RFD), however variation in testing methodologies are known to affect performance outcomes. The aim of this study was to assess the RFD in the isometric squat (ISqT) using two test protocols and two testing angles. Eleven participants (age: 26. Read More

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https://www.tandfonline.com/doi/full/10.1080/02640414.2019.1
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http://dx.doi.org/10.1080/02640414.2019.1576258DOI Listing
February 2019
3 Reads

Are changes in running economy associated with changes in performance in runners? A systematic review and meta-analysis.

J Sports Sci 2019 Feb 27:1-13. Epub 2019 Feb 27.

a Musculoskeletal Health Research Group, School of Clinical and Applied Science , Leeds Beckett University , Leeds , UK.

Improvements in running economy (RE) are thought to lead to improvements in running performance (P). Multiple interventions have been designed with the aim of improving RE in middle and long-distance runners. The aim of this study was to assess the effect of interventions of at least 2-weeks' duration on RE and P and to determine whether there is a relationship between changes in RE (ΔRE) and changes in running performance (ΔP). Read More

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http://dx.doi.org/10.1080/02640414.2019.1575177DOI Listing
February 2019

Clinical and biochemical characteristics of high-intensity functional training (HIFT) and overtraining syndrome: findings from the EROS study (The EROS-HIFT).

J Sports Sci 2019 Jun 20;37(11):1296-1307. Epub 2019 Feb 20.

a Adrenal and Hypertension Unit, Division of Endocrinology and Metabolism, Department of Medicine , Federal University of São Paulo Medical School , São Paulo , Brazil.

The metabolic and hormonal consequences of high-intensity functional training regimens such as CrossFit® (CF) are unclear. Little is known about the triggers and clinical and biochemical features of CF-related overtraining syndrome (OTS). The EROS study compared endocrine and metabolic responses, and eating, social, psychological and body characteristics of OTS-affected (OTS) and healthy athletes (ATL), and non-physically active controls (NPAC). Read More

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https://www.tandfonline.com/doi/full/10.1080/02640414.2018.1
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http://dx.doi.org/10.1080/02640414.2018.1555912DOI Listing
June 2019
5 Reads

Cervical spine kinematics during machine-based and live scrummaging.

J Sports Sci 2019 Feb 19:1-9. Epub 2019 Feb 19.

a School of Allied Health Sciences , Griffith University , Gold Coast , Australia.

The aim of this study was to compare cervical spine kinematics in rugby union front row players during machine-based and "live" scrummaging. Cervical spine kinematics was measured via electromagnetic tracking of sensors attached to the head and thorax. Joint angles were extracted from each trial at two time points ("bind" prior to engagement and instant of impact) for comparison between scrummaging conditions. Read More

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https://www.tandfonline.com/doi/full/10.1080/02640414.2019.1
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http://dx.doi.org/10.1080/02640414.2019.1576254DOI Listing
February 2019
6 Reads

Validity and feasibility of an obstacle course to assess fundamental movement skills in a pre-school setting.

J Sports Sci 2019 Feb 16:1-9. Epub 2019 Feb 16.

c Alliance for Research in Exercise, Nutrition and Activity , Sansom Institute, University of South Australia , Adelaide , Australia.

Failure to master age-appropriate fundamental movement skills (FMS) at a young age can limit motor skill competence affecting health. Assessments often have issues with feasibility and implementation in a field setting. As such, the purpose of this study was to investigate the validity and feasibility of the Athletic Skills Track (AST), in a pre-school setting. Read More

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http://dx.doi.org/10.1080/02640414.2019.1575326DOI Listing
February 2019

Combined effects of exposure to hypoxia and cool on walking economy and muscle oxygenation profiles at tibialis anterior.

J Sports Sci 2019 Feb 16:1-10. Epub 2019 Feb 16.

c Faculty of Health and Sports Science , Doshisya University , Kyoto , Japan.

We investigated combined effects of ambient temperature (23°C or 13°C) and fraction of inspired oxygen (21%O or 13%O) on energy cost of walking (C: J·kg·km) and economical speed (ES). Eighteen healthy young adults (11 males, seven females) walked at seven speeds from 0.67 to 1. Read More

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http://dx.doi.org/10.1080/02640414.2019.1580130DOI Listing
February 2019

The validity and reliability of the Basketball Jump Shooting Accuracy Test.

J Sports Sci 2019 Feb 16:1-7. Epub 2019 Feb 16.

a School of Health Sciences , The University of Notre Dame , Fremantle , Australia.

The aim of this study was to examine the content validity, construct validity and reliability of the newly developed Basketball Jump Shooting Accuracy Test (BJSAT). Basketball athletes from different playing levels (State Basketball League [SBL], n = 30, age: 22.7 ± 6. Read More

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http://dx.doi.org/10.1080/02640414.2019.1582138DOI Listing
February 2019

Energy expenditure and dietary intake in professional football players in the Dutch Premier League: Implications for nutritional counselling.

J Sports Sci 2019 Feb 16:1-9. Epub 2019 Feb 16.

a Institute of Sports and Exercise Studies , HAN University of Applied Sciences , Nijmegen , The Netherlands.

Selecting effective dietary strategies for professional football players requires comprehensive information on their energy expenditure (EE) and dietary intake. This observational study aimed to assess EE and dietary intake over a 14-day period in a representative group (n = 41) of professional football players playing in the Dutch Premier League (Eredivisie). Daily EE, as assessed by doubly labelled water, was 13. Read More

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http://dx.doi.org/10.1080/02640414.2019.1576256DOI Listing
February 2019

Compensatory changes in physical activity and sedentary time in children and adolescents with cystic fibrosis.

J Sports Sci 2019 Feb 16:1-6. Epub 2019 Feb 16.

a A-STEM, College of Engineering , Swansea University , Wales , UK.

Physical activity (PA) is a key element in Cystic Fibrosis (CF) treatment strategies, yet little is known as to whether activity compensation occurs. This study examined whether PA and/or sedentary time on one day were temporally associated with time spent in these intensities the following day in youth with CF. Time spent sedentary and in different PA intensities were objectively-measured for seven consecutive days in 50 youth (22 boys; 12. Read More

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http://dx.doi.org/10.1080/02640414.2019.1574543DOI Listing
February 2019

Jason Lezak again and again - linear mixed modelling analysis of change-over times in relay swimming races.

J Sports Sci 2019 Feb 15:1-8. Epub 2019 Feb 15.

a Institute for Sports and Sport Science , University of Kassel , Kassel , Germany.

The aim of this study was to examine the importance of the change-over time in swimming relay races. Top-class international 4 x 100 m freestyle races were analysed across a 10-year period including three Olympic Games and five European and World Championships. A total of 220 swimmers (116 female, 104 male) were included in this study with an average participation of 1. Read More

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http://dx.doi.org/10.1080/02640414.2019.1578448DOI Listing
February 2019
1 Read

A change point approach to analysing the match activity profiles of team-sport athletes.

J Sports Sci 2019 Feb 12:1-9. Epub 2019 Feb 12.

a Institute for Health and Sport (IHES), Victoria University , Melbourne , Australia.

In team-sport, physical and skilled output is often described via aggregate parameters including total distance and number of skilled involvements. However, the degree to which these output change throughout a team-sport match, as a function of time, is relatively unknown. This study aimed to identify and describe segments of physical and skilled output in team-sport matches with an example in Australian Football. Read More

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https://www.tandfonline.com/doi/full/10.1080/02640414.2019.1
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http://dx.doi.org/10.1080/02640414.2019.1577941DOI Listing
February 2019
2 Reads