847 results match your criteria Acta of Bioengineering and Biomechanics[Journal]


Electromyographic assessment of muscle fatigue after the Biering-Sorensen test in subjects with low back pain who underwent the McKenzie treatment.

Acta Bioeng Biomech 2021 ;23(3):87-96

Poznan University of Physical Education, Poznań, Poland.

Purpose: Chronic low back pain is a common disorder affecting about 80% of the population, caused by a disorder in the muscular system. The main aim of this study was to assess muscle fatigue during the Biering-Sorensen Test in people with chronic low back pain who underwent the McKenzie treatment.

Methods: Tests were conducted on 19 men (mean age of 41. Read More

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January 2022

400 meters freestyle pacing strategy and race pace training in age-group swimmers.

Acta Bioeng Biomech 2021 ;23(3):191-197

Higher Institute of Sports and Physical Education of Ksar Said, University of Manouba, Tunisia.

Purpose: This study aimed to characterize the 400 m freestyle pacing strategy, the effect of post-race feedback, and individualised race-pace training.

Methods: Twenty male swimmers (13.4 ± 1. Read More

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January 2022

The assessment of temperature amplitude arising during the implant bed formation in relation to variable preparation parameters - in vitro study.

Acta Bioeng Biomech 2021 ;23(3):163-173

Department of Pediatric Dentistry and Preclinical Dentistry, Wrocław Medical University, Wrocław, Poland.

The main purpose of this study was to analyse the temperatures generated during the bone bed preparation, given the internal structure of the bone bed, the geometry of the hole, and the treatment parameters such as the type of cooling and the rotational speed of the drill. The investigated material was domestic pig ribs, in which holes were drilled three times using two drill bit systems used for Hiossen® and Paltop® dental implantation. The ThermaCAM® P640 thermal imaging camera was used for measurement of drilling temperatures. Read More

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January 2022

Application of the arm-cranking 30-second Wingate Anaerobic Test (the WAnT) to assess power in amputee football players.

Acta Bioeng Biomech 2021 ;23(3):13-23

Faculty of Rehabilitation, Józef Piłsudski University of Physical Education, Warsaw, Poland.

Purpose: The aim of this work was to determine anaerobic performance in male amputee football players considering types and levels of limb impairment, playing position, anthropometric parameters, and comparing the findings to reference values. Relationship between parameters in the laboratory anaerobic test and the handgrip test was checked.

Methods: The 30-second Wingate Anaerobic Test (peak power, mean power, relative peak power, relative mean power, time to achieve peak power, fatigue index) on the arm-crank ergometer (LODE ANGIO), the FUTREX 6100 (Futrex, Gaithersburg, USA) and the handgrip test were used in amputee football players (n = 23). Read More

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January 2022

Postural stability at different heights as well as in natural standing position and during tandem stance in female athletes who practice artistic gymnastics.

Acta Bioeng Biomech 2021 ;23(3):155-162

Institute of Health Sciences, Medical College, University of Rzeszow, Rzeszów, Poland.

Purpose: The aim of this work was the assessment of postural stability at different heights as well as in natural standing position and during tandem stance in female athletes who practice artistic gymnastics.

Methods: The study comprised 34 athletes aged 8-12, practicing artistic gymnastics at a sports club "Korona Kraków". The research tool was CQ-Stab 2P two-platform posturograph. Read More

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January 2022

Kinematics and workspace analysis of a robotic device for performing rehabilitation therapy of upper limb in stroke-affected patients.

Acta Bioeng Biomech 2021 ;23(3):175-189

Department of Civil Engineering, Rathinam Technical Campus, Coimbatore, Tamil Nadu 641021, India.

Purpose: Exoskeleton robots generally have multi-functions and one such function is doing rehabilitation therapy in upper limb and lower limb in stroke-affected patients. A novel hybrid (serial-parallel) robot manipulator was proposed in this paper for rehabilitation of upper limb and its kinematics are studied systematically. This robot manipulator intends to perform wrist flexion, wrist extension, wrist radial deviation, wrist ulnar deviation, elbow flexion, elbow extension, elbow pronation and elbow supination motions. Read More

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January 2022

The effects of the weight of school supplies carried on the right or left shoulder on postural features in the sagittal and transverse planes in seven-year-old pupils of both genders.

Acta Bioeng Biomech 2021 ;23(3):33-45

University of Szczecin, Institute of Physical Education Sciences, Faculty of Physical Education and Health, Szczecin, Poland.

Purpose: The aim of the study was to examine how the weight of a school backpack with school supplies carried on the right or left shoulder influences body posture in schoolchildren.

Methods: The study of body posture was carried out on a group of 65 pupils aged 7, using the mora projection method in the following eight positions: (four positions for the diagonal loading of the right shoulder and four positions for the loading of the left shoulder) 1 - the habitual posture, 2 - the posture after a 10-minute asymmetric loading, 3 - the posture one minute after removing the load and 4 - the posture two minutes after removing the load. The fitness level was measured using the Sekita test. Read More

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January 2022

Bionic mechanical design and SLM manufacture of porous Ti6Al4V scaffolds for load-bearing cancellous bone implants.

Acta Bioeng Biomech 2021 ;23(3):97-107

Tribology Research Institute, Key Laboratory for Advanced Technology of Materials of Ministry of Education, Southwest Jiaotong University, Chengdu, China.

In order to repair the load-bearing cancellous bone defect of the human lower extremity, the development of a porous scaffold with high porosity, appropriate pore size, low elastic modulus and high fatigue strength has been faced with great challenges. In this study, the Ti6Al4V coaxial scaffolds with five types of beam angles and three types of pore sizes were designed using CAD and fabricated with the use of SLM. The porous characteristics and mechanical properties of scaffolds were investigated systematically. Read More

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January 2022

Hamstring weakness at 90° flexion of involved knee as an indicator of the function deficit in males after anterior cruciate ligament reconstruction (ACLR).

Acta Bioeng Biomech 2021 ;23(3):147-153

Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Sivas Cumhuriyet University, Sivas, Turkey.

Purpose: The aim of this study was to elucidate predictors on knee function following anterior cruciate ligament reconstruction with hamstring tendon graft or allograft and to detect the differences between it and the healthy controls.

Methods: This study comprised of 46 males, aged 18-45, being within 6-60 months following unilateral anterior cruciate ligament reconstruction and 50 healthy men. Measurements included the Tampa Scale for Kinesiophobia-17, the self-reported knee function with the Knee Injury and Osteoarthritis Outcome Score, Tegner activity scale and handheld dynamometry the hamstring/quadriceps femoris muscle testing at 90° of flexion. Read More

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January 2022

Assessment of marginal integrity of five different polymers in retrograde root-end filling following apicoectomy: An in-vitro analysis with scanning electron microscope and micro-radiography.

Acta Bioeng Biomech 2021 ;23(3):133-145

Department of Oral and Maxillofacial Surgery, University Hospital of Schleswig-Holstein, Campus Kiel, Kiel, Germany.

Purpose: The aim of the study was to evaluate marginal adaptation properties of five different sealers used as root filling material.

Materials: Apical resection was performed on 100 canals of 50 maxillary premolars in slaughtered pigs. The root end of 24 canals were retrogradely filled with Diaket™, 37 root canals with Super-EBA™ including 18 with Super-EBA™. Read More

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January 2022

Immediate after-effects of shapes of clothing worn on tandem gait performance.

Authors:
Kazushige Oshita

Acta Bioeng Biomech 2021 ;23(3):79-85

Department of Human Information Engineering, Okayama Prefectural University, Soja-shi, Japan.

Purpose: This study investigated the immediate after-effects of clothing shape on tandem gait performance.

Methods: Nineteen healthy men (21.8 ± 1. Read More

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January 2022

Effect of different self-selected walking speeds in leveling of body center of mass, mechanical work and energy in healthy children.

Acta Bioeng Biomech 2021 ;23(3):125-131

Faculty of Medicine, Universidad de la República, Montevideo, Uruguay.

Purpose: The aim of the study was to analyze the general kinematics of the cycle, leveling of the center of mass and inverted pendulum model in school-age children when they walk at three different auto-selected speeds.

Methods: The kinematics of walking cycle, angular actions that contribute to reducing the vertical displacement of body center of mass (pelvis, hip, knee and ankle) and pendulumlike determining variables (mechanical work, pendulum-like recovery and congruity percentage), were analyzed in children for three different self-selected speeds. Differences for each variable with the speed were tested by ANOVA with Bonferroni post-hoc analysis. Read More

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January 2022

Assessment of the level of static and dynamic balance in healthy people, practicing selected Latin American dances.

Acta Bioeng Biomech 2021 ;23(3):61-68

Department of Biomechanics and Kinesiology, Faculty of Health Sciences, Jagiellonian University Medical College, Kraków.

Purpose: The balance, known as the ability to independently maintain the body in a certain position and return to the starting position, can be divided into static and dynamic balances. Social Latin American dances (salsa, bachata) require dancers to do a characteristic figure, however, they are not trained as intensively as dancing sports. The aim of the study was to assess the static and dynamic balances of dancers, who are regularly dancing those selected Latin American dances, by comparison with those who do not. Read More

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January 2022

The effect of pH on determination of activation energies and the optimum temperatures of hydrolysis of olive oil by lipase from porcine pancreas.

Authors:
Justyna Miłek

Acta Bioeng Biomech 2021 ;23(3):25-31

Department of Chemical and Biochemical Engineering, Faculty of Chemical Technology and Engineering, University of Science and Technology in Bydgoszcz, Bydgoszcz, Poland.

Purpose: The present paper reports the determination of the activation energies and the optimum temperatures of olive oil hydrolysis by porcine pancreas lipase with simultaneous effect of pH.

Methods: The parameters were estimated based on the literature data on the activity curves versus temperature for olive oil hydrolysis by lipase obtained from porcine pancreas. It was assumed that both the hydrolysis reaction process and the deactivation process of lipase were first-order reactions by the enzyme concentration. Read More

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January 2022

Temporal and spatial variability of the fidgety movement descriptors and their relation to head position in automized general movement assessment.

Acta Bioeng Biomech 2021 ;23(3):69-78

Institute of Physiotherapy and Health Science, Academy of Physical Education in Katowice, Katowice, Poland.

Purpose: In clinical practice, motor development in infants is assessed subjectively. Many researchers propose objective methods, which have numerous limitations, by attaching markers or sensors to the child's limbs. The purpose of this study is to attempt to develop objectified numerical indices to describe the limb movements of infants without interfering with spontaneous activity. Read More

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January 2022

Multiple regression analysis predicts the dynamic of chondrocytes stimulated by magnetic and electric fields.

Acta Bioeng Biomech 2021 ;23(3):109-124

Biomimetics Laboratory, Instituto de Biotecnología, Universidad Nacional de Colombia, Bogotá, Colombia.

Purpose: The aim of this study was to implement a multiple regression analysis to find mathematical models that estimate the proliferative rate and the molecular synthesis of chondrocytes when these cells are stimulated either by magnetic or electric fields.

Methods: Data derived from previous studies performed in our laboratory were used for statistical analyses, which consisted of applying magnetic fields (1 and 2 mT) and electric fields (4 and 8 mV/cm) to chondrocytes. Data from cell proliferation and glycosaminoglycan expression were used to adjust and to validate each mathematical model. Read More

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January 2022

How to teach safe landing after the jump? The use of biofeedback to minimize the shock forces generated in elements of modern dance.

Acta Bioeng Biomech 2021 ;23(3):47-59

Department of Biomechatronics, Faculty of Biomedical Engineering, Silesian University of Technology, Zabrze, Poland.

Purpose: The aim of the study was to assess the possible use of biofeedback (information on the course and values of ground reaction forces (GRF) during landing following the performance of a dance evolution) for training minimising impact loads after a jump in modern dance.

Methods: The tests involved the analysis of a total of 60 expressive elements of modern dance performed by 5 soloists. The tests involved the recording of the vertical component of GRF (GRFz) vector using Kistler platform in the landing phase following the performance of modern dance jumps. Read More

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January 2022

Trabecular bone remodelling in the femur of C57BL/6J mice treated with diclofenac in combination with treadmill exercise.

Acta Bioeng Biomech 2021 ;23(3):3-11

Department of Paediatric Orthopaedics and Traumatology, Poznan University of Medical Sciences, Poznań, Poland.

Purpose: Analgesic treatment with diclofenac deteriorates bone structure and decreases biomechanical properties. This bone loss has been though to be reversed by training. The impact of exercise on bone treated with diclofenac (DF) has reminded elusive. Read More

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January 2022

Augmented reality visualization for aiding biopsy procedure according to computed tomography based virtual plan.

Acta Bioeng Biomech 2021 ;23(2):81-89

Department of Plastic Surgery, Prof. W. Orlowski Memorial Hospital, Medical Centre of Postgraduate Education, Warsaw, Poland.

Purpose: The purpose of this study was to develop and verify an intraoperative module for supporting navigated biopsy procedures using optical see-through head-mounted display (HMD).

Methods: Biopsy procedure including entry and endpoints of needle insertion was planned preoperatively having regard to the resection region segmentation and safety margin definition. Biopsy procedures were performed by two users using an intraoperative optical navigation module on a specially prepared brain phantom. Read More

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December 2021

Lower extremity stiffness in habitual forefoot strikers during running on different overground surfaces.

Acta Bioeng Biomech 2021 ;23(2):73-80

Department of Sports Rehabilitation, Shanghai University of Sport, Shanghai, China.

Purpose: Sports surface is one of the known external factors affecting running performance and injury. To date, we have found no study that examined the lower extremity stiffness in habitual forefoot strikers running on different overground surfaces. Therefore, the objective of this study was to investigate lower extremity stiffness and relevant kinematic adjustments in habitual forefoot strikers while running on different surfaces. Read More

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December 2021

The impact of obesity and age on the risk of falls in elderly women.

Acta Bioeng Biomech 2021 ;23(2):123-130

Józef Piłsudski University of Physical Education in Warsaw, Faculty of Rehabilitation, Warsaw, Poland.

Purpose: The aim of this study was to examine the effect of obesity and age on body balance disorders in women over 60, especially whether obesity increases the FR in older females and whether age and obesity affect the same stabilographic parameters when it comes to the FR.

Methods: The study consisted of 56 inactive females aged 71.77 ± 7. Read More

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December 2021

Application of closed kinematic chain exercises with eccentric and strength exercises for the shoulder injuries prevention in student rock climbers: a randomized controlled trial.

Acta Bioeng Biomech 2021 ;23(2):159-168

Department of Theory and Methods of Labor Training and Technology, Taras Shevchenko Kremenets Regional Humanitarian and Pedagogical Academy, Kremenets, Ukraine.

Purpose: The aim of this work to determine the influence of a program containing exercises in a closed kinematic chain, eccentric and strength exercises on injuries of students - rock climbers.

Methods: Participants in this study were 84 male amateur climbing students, aged 18-19, 40 athletes were in the intervention group and 44 in the control group. In the intervention group, the program for the injuries prevention has been stalled. Read More

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December 2021

Evaluation of transport properties of biomembranes by means of Peusner network thermodynamics.

Acta Bioeng Biomech 2021 ;23(2):63-72

Department of Health Science, Jan Dlugosz University, Częstochowa, Poland.

Purpose: The R version of the Kedem-Katchalsky-Peusner (KKP) network equations is one of the basic research tools for membrane transport. For binary solutions of non-electrolytes containing a solvent and one solute, these equations include the Peusner resistance coefficients. The aim of the study was to assess the transport properties of biomembranes on the basis of the concentration characteristics of the coefficients: resistance, coupling, energy conversion efficiency and degraded and free energy fluxes. Read More

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December 2021

Numerical insights into the determinants of stent performance for the management of aneurysm with a visceral vessel attached.

Acta Bioeng Biomech 2021 ;23(2):41-53

Department of Applied Mechanics, Sichuan University, Chengdu, China.

Purpose: As the factors affecting the efficacy of the bare-metal stent in the treatment of aneurysm with a visceral vessel attached were not fully understood, we aimed to discuss the effects of different characteristics of the stent on the hemodynamics and flexibility in the treatment of the aneurysm.

Methods: Single-layer (with different strut widths) and multi-layer (with a different number of struts) stent models divided into three porosity groups, with porosities of 72.3, 60. Read More

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December 2021

Differentiating fallers from nonfallers using nonlinear variability analyses of data from a low-cost portable footswitch device: a feasibility study.

Acta Bioeng Biomech 2021 ;23(2):139-145

Department of Biomechanics and Center for Research in Human Movement Variability, University of Nebraska at Omaha, Omaha, Nebraska, United States of America.

Purpose: Falls are one of the main causes of injuries in older adults. This study evaluated a low-cost footswitch device that was designed to measure gait variability and investigates whether there are any relationships between variability metrics and clinical balance tests for individuals with a history of previous falls.

Methods: Sixteen older adults completed a history of falls questionnaire, three functional tests related to fall risk, and walked on a treadmill with the footswitch device. Read More

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December 2021

Stress relaxation of porcine tendon under simulated biological environment: experiment and modeling.

Acta Bioeng Biomech 2021 ;23(1):59-68

Cracow University of Technology, Faculty of Mechanical Engineering, Department of Applied Mechanics and Biomechanics, Kraków, Poland.

Purpose: The aim of the study was to investigate the viscoelastic response in the low and high physiological strain with the use of experimental and modeling approach.

Methods: Viscoelastic response in the low, transition and high physiologic strain (3, 6 and 9%) with consideration of simulated biological environment (0.9% saline solution, 37 °C) was measured in relaxation tests. Read More

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December 2021

Study on friction behavior at the interface between prosthetic socket and liner.

Acta Bioeng Biomech 2021 ;23(1):83-93

Tribology Research Institution, Key Laboratory for Advanced Technology of Materials of Ministry of Education, Southwest Jiaotong University, Chengdu, People's Republic of China.

Purpose: The friction characteristics at the interface between prosthetic socket and liner have an important influence on the walking function and wearing comfort of amputees. The frictional behavior at the prosthetic socket/liner interface can provide theoretical guidance for the design and selection of prosthetic materials. So it is of great significance to study the friction behavior at prosthetic socket/liner interface. Read More

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December 2021

A novel modeling approach for finite element human body models with high computational efficiency and stability: application in pedestrian safety analysis.

Acta Bioeng Biomech 2021 ;23(2):33-40

Chongqing Key Laboratory of Vehicle Crash/Bio-Impact and Traffic Safety, Institute for Traffic Medicine, Daping Hospital, Army Medical University, Chongqing, China.

Purpose: The purpose of the current study was to develop and validate a finite element (FE) pedestrian model with high computational efficiency and stability using a novel modeling approach.

Methods: Firstly, a novel modeling approach of using hollow structures (HS) to simulate the mechanical properties of soft tissues under impact loading was proposed and evaluated. Then, an FE pedestrian model was developed, employing this modeling approach based on the Total Human Model for Safety (THUMS) pedestrian model, named as THUMS-HS model. Read More

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December 2021

Running speed does not influence the asymmetry of kinematic variables of the lower limb joints in novice runners.

Acta Bioeng Biomech 2021 ;23(1):69-81

Faculty of Sports Science, Ningbo University, Ningbo, China.

Purpose: The purpose of this study was to evaluate kinematic variables at 5 running speeds (8 to 12 km/h), for the asymmetry between lower limbs. We also investigated the effects of running speed on the bilateral asymmetry of the lower limb joints kinematic variables among novice runners.

Methods: Kinematic (200 Hz) running data were collected bilaterally for 17 healthy male novice runners (age: 23. Read More

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December 2021

Assessment of myofascial stiffness of flexor digitorum superficialis muscles in rock climbers.

Acta Bioeng Biomech 2021 ;23(2):23-31

Department of Musculoskeletal Rehabilitation, Poznan University of Physical Education, Poznań, Poland.

Purpose: Myofascial stiffness is the biomechanical property that can be considered as a modifiable risk factor injury of athletes. Moreover, the level of muscle stiffness can be crucial to assessment muscle adaptation to exercise. However, stiffness of flexor muscles in rock climbers has never been investigated. Read More

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December 2021