24,864 results match your criteria leg movements

Heart rate changes associated with the different types of leg movements during sleep in children, adolescents and adults with restless legs syndrome.

J Sleep Res 2021 May 6:e13379. Epub 2021 May 6.

Seattle Children's Hospital and University of Washington, Seattle, WA, USA.

The objective of this study was to describe in detail the heart rate changes accompanying short-interval leg movements during sleep, periodic leg movements during sleep, and isolated leg movements during sleep in children and adolescents with restless legs syndrome, and to compare them with the same findings in adults with restless legs syndrome. We analysed time series of R-R intervals synchronized to the onset of short-interval leg movements during sleep, periodic leg movements during sleep or isolated leg movements during sleep that entailed an arousal during non-rapid-eye-movement sleep. We assessed cardiac activation based on the heart rate changes with respect to baseline during non-rapid-eye-movement sleep without leg movements. Read More

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Neuromuscular taping treatment of diabetic foot: a concept analysis.

Clin Ter 2021 May;172(3):231-235

NeuroMuscular Taping Institute, Rome, Italy.

Objective: The definition of neuromuscular taping (NMT) has yet to be clearly analysed as a possible treatment for diabetic foot. Case studies, theoretical analysis and results of existing research may lead to varying perceptions on the definition of NMT and its possible effects on diabetic foot. This article aims to analyse the definition of the NMT concept and furthermore as a basis for future research development on diabetic foot. Read More

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Test-Retest Reliability of a Functional Reaction Time Assessment Battery.

J Sport Rehabil 2021 May 5:1-5. Epub 2021 May 5.

Context: Reaction time is commonly assessed postconcussion through a computerized neurocognitive battery. Although this measure is sensitive to postconcussion deficits, it is not clear if computerized reaction time reflects the dynamic reaction time necessary to compete effectively and safely during sporting activities. Functional reaction time assessments may be useful postconcussion, but reliability must be determined before clinical implementation. Read More

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Aberrant activity in an intact residual muscle is associated with phantom limb pain in above-knee amputees.

J Neurophysiol 2021 May 5. Epub 2021 May 5.

Moss Rehabilitation Research Institute, Elkins Park, PA, United States.

Many individuals who undergo limb amputation experience persistent phantom limb pain (PLP), but the underlying mechanisms of PLP are unknown. The traditional hypothesis was that PLP resulted from maladaptive plasticity in sensorimotor cortex that degrades the neural representation of the missing limb. However, a recent study of individuals with upper limb amputations has shown that PLP is correlated with aberrant electromyographic (EMG) activity in residual muscles, posited to reflect a retargeting of efferent projections from a preserved representation of a missing limb. Read More

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Copers and Noncopers Use Different Landing Techniques to Limit Anterior Tibial Translation After Anterior Cruciate Ligament Reconstruction.

Orthop J Sports Med 2021 Apr 16;9(4):2325967121998061. Epub 2021 Apr 16.

Department of Rehabilitation Medicine, University Medical Center Groningen, Groningen, the Netherlands.

Background: At 1 year after anterior cruciate ligament reconstruction (ACLR), two-thirds of patients manage to return to sports (copers), whereas one-third of patients do not return to sports (noncopers). Copers and noncopers have different muscle activation patterns, and noncopers may not be able to control dynamic anterior tibial translation (ATTd) as well as copers.

Purpose/hypothesis: To investigate whether (1) there is a positive correlation between passive ATT (ATTp; ie, general joint laxity) and ATTd during jump landing, (2) whether ATTd is moderated by muscle activating patterns, and (3) whether there is a difference in moderating ATTd between copers and noncopers. Read More

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Factors Associated With Lower Limb Injuries in Recreational Runners: A Cross-Sectional Survey Including Mental Aspects and Sleep Quality.

J Sports Sci Med 2021 Jun 5;20(2):204-215. Epub 2021 Mar 5.

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

Knowledge about prevalence and etiology of running-related injuries (RRIs) is important to design effective RRI prevention programs. Mental aspects and sleep quality seem to be important potential risk factors, yet their association with RRIs needs to be elucidated. The aims of this study are to investigate the epidemiology of RRIs in recreational runners and the association of mental aspects, sleep, and other potential factors with RRIs. Read More

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Relationship between Sprint, Change of Direction, Jump, and Hexagon Test Performance in Young Tennis Players.

J Sports Sci Med 2021 Jun 5;20(2):197-203. Epub 2021 Mar 5.

Tennis Performance Research Group, Madrid, Spain.

The hexagon agility test is widely used in tennis players' fitness evaluation, although its validity has not been fully stablished. This study aimed to assess the relationships between sprinting, jumping, and change of direction (COD) ability and hexagon test performance. Thirty-five under-16 tennis players completed a testing battery including the hexagon test, 20-m linear sprint, bilateral and unilateral countermovement jumps (CMJ), triple leg-hop for distance, T-Test, 5-0-5 and Pro-Agility test on two different sessions, separated by one week. Read More

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The non-sagittal knee moment vector identifies 'at risk' individuals that the knee abduction moment alone does not.

Sports Biomech 2021 May 5:1-11. Epub 2021 May 5.

Rehabilitation Research Institute of Singapore, Nanyang Technological University, Singapore.

Multi-planar forces and moments are known to injure the anterior cruciate ligament (ACL). In ACL injury risk studies, however, the uni-planar frontal plane external knee abduction moment is frequently studied in isolation. This study aimed to determine if the frontal plane knee moment (KM-Y) could classify all individuals crossing a risk threshold compared to those classified by a multi-planar non-sagittal knee moment vector (KM-YZ). Read More

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Physical Functions and Comorbidity Affecting Collapse at 4 or More Weeks after Admission in Patients with Osteoporotic Vertebral Fractures: A Prospective Cohort Study.

Asian Spine J 2021 May 6. Epub 2021 May 6.

Department of Health Informatics, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.

Study Design: A prospective cohort study.

Purpose: This study aimed to reveal physical functions and comorbidity affecting collapse at ≥4 weeks after hospital admission of patients with osteoporotic vertebral fracture.

Overview Of Literature: Only a few studies have investigated the influence of physical function and activity on collapse in patients with osteoporotic vertebral fractures. Read More

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The Sacroiliac Joint as a Cause of Pain - Review of the Sacroiliac Joint Morphology and Models for Pain Genesis.

Z Orthop Unfall 2021 May 3. Epub 2021 May 3.

Orthopaedic, Trauma Surgery and Plastic Surgery Clinic, Leipzig University Clinics, Germany.

Introduction: In recent years, the sacroiliac joint has become increasingly important as a generator of low back pain with and without pseudo-radicular pain in the legs. Up to 27% of reported back pain is generated by disorders in the sacroiliac joint.

Method: This review is based on a selective literature search of the sacroiliac joint (SIJ) as a possible pain generator. Read More

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Changing Stride Frequency Alters Average Joint Power and Power Distributions during Ground Contact and Leg Swing in Running.

Med Sci Sports Exerc 2021 Apr 27. Epub 2021 Apr 27.

Human Movement Biomechanics research group, Department of Movement Science, KU Leuven, Belgium Department of Kinesiology, University of Massachusetts, Amherst, MA.

Purpose: Runners naturally adopt a stride frequency closely corresponding with the stride frequency that minimizes energy consumption. While the concept of self-optimization is well recognized, we lack mechanistic insight in the association between stride frequency and energy consumption. Altering stride frequency affects lower extremity joint power, however these alterations are different between joints, possibly with counteracting effects on the energy consumption during ground contact and swing. Read More

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Association of Central Hypersomnia and Fatigue in Patients With Multiple Sclerosis: A Polysomnographic Study.

Neurology 2021 Apr 30. Epub 2021 Apr 30.

Neurology Department, Saint Antoine Hospital, AP-HP, Paris.

Objective: To evaluate sleepiness and central hypersomnia in multiple sclerosis (MS) associated fatigue, we performed long term polysomnography in MS patients and healthy controls.

Methods: Patients with MS and healthy controls completed questionnaires on sleep, fatigue, sleepiness, and depression. They underwent nocturnal polysomnography, multiple sleep latency tests and bed rest 24-hour polysomnography. Read More

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First growth reference curves for Tunisian children and adolescents.

Arch Pediatr 2021 Apr 27. Epub 2021 Apr 27.

Research Unit, Sportive Performance and Physical Rehabilitation, High Institute of Sports and Physical Education of Kef, University of Jendouba, Kef, Tunisia.

A growth chart is a powerful graphical tool displaying children's growth patterns. The aim of this study was to develop growth reference curves appropriate for Tunisian children. The collection of data from this cross-sectional study was conducted on 4358 healthy subjects (2182 girls and 2176 boys) in three pediatric centers and 15 schools. Read More

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Effects of Twelve Sessions of High-Temperature Sauna Baths on Body Composition in Healthy Young Men.

Int J Environ Res Public Health 2021 Apr 22;18(9). Epub 2021 Apr 22.

Department of Physiology, School of Sport Sciences, University of Extremadura, 10003 Cáceres, Spain.

The health benefits of sauna baths are attracting ever-increasing interest. Therefore, the purpose of this study was to evaluate the effects of 12 high-temperature (100 °C) sauna baths on body composition of 23 healthy young men, divided into a control group (CG) and a sauna group (SG). Both groups were initially evaluated by dual-energy X-ray absorptiometry (DXA), after which the SG experienced 12 sessions of sauna baths at high temperatures (100 °C). Read More

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Locomotion Mode Recognition for Walking on Three Terrains Based on sEMG of Lower Limb and Back Muscles.

Sensors (Basel) 2021 Apr 22;21(9). Epub 2021 Apr 22.

School of Biomedical Engineering, South-Central University for Nationalities, Wuhan 430074, China.

Gait phase detection on different terrains is an essential procedure for amputees with a lower limb assistive device to restore walking ability. In the present study, the intent recognition of gait events on three terrains based on sEMG was presented. The class separability and robustness of time, frequency, and time-frequency domain features of sEMG signals from five leg and back muscles were quantitatively evaluated by statistical analysis to select the best features set. Read More

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Neuromuscular Control before and after Independent Walking Onset in Children with Cerebral Palsy.

Sensors (Basel) 2021 Apr 12;21(8). Epub 2021 Apr 12.

Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Amsterdam Movement Sciences, Institute for Brain and Behavior Amsterdam, Vrije Universiteit Amsterdam, 1081 BT Amsterdam, The Netherlands.

Early brain lesions which produce cerebral palsy (CP) may affect the development of walking. It is unclear whether or how neuromuscular control, as evaluated by muscle synergy analysis, differs in young children with CP compared to typically developing (TD) children with the same walking ability, before and after the onset of independent walking. Here we grouped twenty children with (high risk of) CP and twenty TD children (age 6. Read More

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A Bio-Inspired Compliance Planning and Implementation Method for Hydraulically Actuated Quadruped Robots with Consideration of Ground Stiffness.

Sensors (Basel) 2021 Apr 17;21(8). Epub 2021 Apr 17.

State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.

There has been a rising interest in compliant legged locomotion to improve the adaptability and energy efficiency of robots. However, few approaches can be generalized to soft ground due to the lack of consideration of the ground surface. When a robot locomotes on soft ground, the elastic robot legs and compressible ground surface are connected in series. Read More

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Morphological and Motor Fitness Determinants of Shotokan Karate Performance.

Int J Environ Res Public Health 2021 Apr 21;18(9). Epub 2021 Apr 21.

Department of Physiology and Biochemistry, Poznan University of Physical Education, 61-871 Poznań, Poland.

The achievement of high performance levels in a complex structured sport such as karate is determined by the competitor's physical fitness, fighting technique, tactics and mental state. This study aimed to identify the most important determinants of top-level performance in karate.

Methods: The participants were 32 karate competitors (12 women and 20 men) aged 18-25 years. Read More

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Effects of Adding Inter-Set Static Stretching to Flywheel Resistance Training on Flexibility, Muscular Strength, and Regional Hypertrophy in Young Men.

Int J Environ Res Public Health 2021 Apr 4;18(7). Epub 2021 Apr 4.

Metabolism, Nutrition, and Exercise Laboratory, Physical Education and Sport Center, Londrina State University, Londrina 86050-070, Brazil.

Performing static stretching (SS) during resistance training (RT) rest periods is posited to potentiate muscular adaptations, but the literature is scarce on the topic. Thus, the purpose of this study was to investigate the effects of adding inter-set SS to a lower-limb flywheel RT program on joint flexibility, muscular strength, and regional hypertrophy. Sixteen untrained male adults (21 ± 1 y) completed the study, where they performed progressive flywheel bilateral squatting twice a week for 5 weeks. Read More

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Functional Movement Quality of Firefighter Recruits: Longitudinal Changes from the Academy to Active-Duty Status.

Int J Environ Res Public Health 2021 Apr 1;18(7). Epub 2021 Apr 1.

Human Performance and Sport Physiology Laboratory, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA.

Approximately half of the injuries experienced by firefighters consist of musculoskeletal injuries (MSKIs). Functional movement quality may be associated with MSKI risk within this tactical athlete population. Previous research indicates that measures of body composition change among firefighter recruits progressing from academy training through active-duty service, but similar changes in functional movement quality have yet to be examined. Read More

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Polio survivors have poorer walking adaptability than healthy individuals.

Gait Posture 2021 Apr 21;87:143-148. Epub 2021 Apr 21.

Amsterdam UMC, University of Amsterdam, Department of Rehabilitation Medicine, Amsterdam Movement Sciences, Meibergdreef 9, Amsterdam, the Netherlands.

Background: Falling is a major health problem in polio survivors, often occurring as a result of tripping, slipping or misplaced steps. Therefore, reduced walking adaptability possibly plays an important role.

Research Question: Does walking adaptability, assessed on an interactive treadmill, differ between polio survivors and healthy individuals?

Methods: In this cross-sectional study, 48 polio survivors with at least one reported fall in the past year and/or fear of falling and 25 healthy individuals of similar age walked at self-selected comfortable fixed speed on an instrumented treadmill. Read More

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Current limits for flowmeter resistance in metabolic carts can negatively affect exercise performance.

Physiol Rep 2021 Apr;9(7):e14814

Exercise Physiology Lab, Institute of Human Movement Sciences and Sport, ETH Zurich, Zurich, Switzerland.

Purpose: To investigate whether a metabolic cart using a flowmeter in the upper range of accepted resistance to airflow (<1.5 cmH O∙L ∙s for flows up to 14 L∙s , American Thoracic Society) negatively impacts exercise performance in healthy individuals.

Methods: 16 recreationally active males (age 25 ± 1 years, height 180 ± 6 cm, weight 73. Read More

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Effect of increasing speed on whole-body angular momentum during stepping in the elderly.

J Biomech 2021 Apr 18;122:110436. Epub 2021 Apr 18.

Laboratoire IRISSE - EA4075, UFR des Sciences de l'Homme et de l'Environnement, Université de la Réunion, 117 rue du Général Ailleret, 97430 Le Tampon, Ile de la Réunion, France.

Recent evidence suggests that older adults may have difficulty controlling whole-body angular momentum (H) during volitional stepping, which could impose a major challenge for balance control and result in potential falls. However, it is not known if and how H is influenced by speed when stepping. This study aimed to investigate the effect on H of increasing speed during step initiation in older adults. Read More

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Stretch-Shortening Cycle Potentiation and Resistance Training-Induced Changes in Walking Economy/Ease and Activity-Related Energy Expenditure in Older Women.

J Strength Cond Res 2021 May;35(5):1345-1349

Department of Kinesiology, School of Public Health-Bloomington, Indiana University, Bloomington, Indiana.

Abstract: Hunter, GR, Singh, H, Martins, C, Baranauskas, MN, and Carter, SJ. Stretch-shortening cycle potentiation and resistance training-induced changes in walking economy/ease and activity-related energy expenditure in older women. J Strength Cond Res 35(5): 1345-1349, 2021-Use of elastic energy to improve economy and ease of walking may be important for older adults. Read More

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Blood Flow Restriction Does Not Promote Additional Effects on Muscle Adaptations When Combined With High-Load Resistance Training Regardless of Blood Flow Restriction Protocol.

J Strength Cond Res 2021 May;35(5):1194-1200

School of Physical Education and Sport, University of São Paulo, São Paulo, SP, Brazil.

Abstract: Teixeira, EL, Ugrinowitsch, C, de Salles Painelli, V, Silva-Batista, C, Aihara, AY, Cardoso, FN, Roschel, H, and Tricoli, V. Blood flow restriction does not promote additional effects on muscle adaptations when combined with high-load resistance training regardless of blood flow restriction protocol. J Strength Cond Res 35(5): 1194-1200, 2021-The aim of this study was to investigate, during high-load resistance training (HL-RT), the effect of blood flow restriction (BFR) applied during rest intervals (BFR-I) and muscle contractions (BFR-C) compared with HL-RT alone (no BFR), on maximum voluntary isometric contraction (MVIC), maximum dynamic strength (one repetition maximum [1RM]), quadriceps cross-sectional area (QCSA), blood lactate concentration ([La]), and root mean square of the surface electromyography (RMS-EMG) responses. Read More

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Vision Affects Gait Speed but not Patterns of Muscle Activation During Inclined Walking-A Virtual Reality Study.

Front Bioeng Biotechnol 2021 9;9:632594. Epub 2021 Apr 9.

Center of Advanced Technologies in Rehabilitation, Sheba Medical Center, Ramat Gan, Israel.

While walking, our locomotion is affected by and adapts to the environment based on vision- and body-based (vestibular and proprioception) cues. When transitioning to downhill walking, we modulate gait by braking to avoid uncontrolled acceleration, and when transitioning to uphill walking, we exert effort to avoid deceleration. In this study, we aimed to measure the influence of visual inputs on this behavior and on muscle activation. Read More

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Static and dynamic postural stability of children girls engaged in modern dance.

Eur J Sport Sci 2021 Apr 26:1-9. Epub 2021 Apr 26.

Faculty of Sport and Physical Education, University of Novi Sad, Novi Sad, Serbia.

Background: Postural stability (PS) has an important role in many athletic activities. However, modern dance demands a heightened PS because of the required aesthetic quality and speed of movement. The aim of the present study was to compare the static and dynamic PS of young dancers and participants of other sporting activities. Read More

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Lower extremity joint kinematics of a simulated lateral ankle sprain after drop landings in participants with chronic ankle instability.

Sports Biomech 2021 Apr 26:1-19. Epub 2021 Apr 26.

Department of Kinesiology, Mississippi State University, Mississippi State, MS, USA.

This study examined lower extremity joint kinematics in individuals with chronic ankle instability (CAI) and controls during unanticipated and anticipated single-leg drop landings onto a laterally inclined platform. Physically active adults with CAI 15 ( = 15) and controls ( = 15) performed an unanticipated and anticipated 30 cm single-leg drop landing onto a 20° laterally inclined platform. Three-dimensional ankle, knee and hip-joint kinematics were recorded 200 ms pre- to 200 post-landing and analysed with a 2 (group) × 2 (landing condition) SPM ANOVA (p < 0. Read More

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Sex differences in postural control under unstable conditions in schoolchildren with accelerometric assessment.

Gait Posture 2021 Apr 19;87:81-86. Epub 2021 Apr 19.

Faculty of Education and Sport Sciences, Universidade de Vigo, Campus a Xunqueira, s/n., 36005, Pontevedra, Spain. Electronic address:

Background: Although the effects of balance training on unstable surfaces have been widely studied, the impact of exposure to an unstable surface in static balance throughout childhood has not been described to date.

Research Question: How does postural stability vary between sexes in children 6-12 years of age during single leg static support on unstable surface? What are the normative values of centre of mass acceleration in the mentioned age range during such test? Is the postural stability on an unstable surface in the postural control of children aged 6-12 years during static single-leg stance. Secondarily, the normative acceleration values of the gravity centre, recorded during such tests and throughout the mentioned age range, were also provided. Read More

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Only the fastest corticospinal fibers contribute to beta corticomuscular coherence.

J Neurosci 2021 Apr 23. Epub 2021 Apr 23.

Department of Bioengineering, Imperial College London, London SW7 2AZ, UK.

Human corticospinal transmission is commonly studied using brain stimulation. However, this approach is biased to activity in the fastest conducting axons. It is unclear whether conclusions obtained in this context are representative of volitional activity in mild-to-moderate contractions. Read More

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