647 results match your criteria Acta Of Bioengineering And Biomechanics[Journal]


Center of plantar pressure during gait in pregnancy-related pelvic girdle pain and the effect of pelvic belts.

Acta Bioeng Biomech 2018 ;20(4):69-76

Laboratory of Functional Anatomy, Faculty of Motor Sciences, Université Libre de Bruxelles (ULB), Brussels, Belgium.

Purpose: Many pregnant women suffer from pelvic girdle pain (PGP) during pregnancy. Etiologies are multifactorial and affect the joint stability of the sacroiliac joint. Pelvic belts could restore stability and reduce pain during gait. Read More

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March 2019
3 Reads

Force analysis of shoulder joint muscles in the early phase of brain stroke.

Acta Bioeng Biomech 2018 ;20(4):107-113

Department of Physical Medicine, Medical University of Lodz, Łódź, Poland.

Purpose: Upper limb impairment in the early phase of brain stroke is one of the key problems in rehabilitation. An estimation of muscle force can be a helpful factor for functional improvement after a stroke. The primary goals of this study were to determine the muscles with the lowest force in the affected (A) and non-affected (non-A) upper limb. Read More

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March 2019
14 Reads

The change of volume of the lumbar vertebrae along with aging in asymptomatic population: a preliminary analysis.

Acta Bioeng Biomech 2018 ;20(4):25-30

Department of Orthopedics and Traumatology, W. Dega University Hospital, Poznań, Poland.

Introduction: Previous studies have demonstrated that the length of the lumbar spine is decreasing with age. Despite considerable research based on sagittal measurements, little is known about the changes in the volume of vertebrae. The objective of this study was to evaluate the changes in the volume of either column of the spine with age. Read More

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March 2019
13 Reads

The influence of different intensity treadmill efforts on the sense of rhythm of non-professional runners - pilot study.

Acta Bioeng Biomech 2018 ;20(4):11-17

The Jerzy Kukuczka Academy of Physical Education in Katowice, Department of Human Motor Behavior, Katowice, Poland.

Purpose: The purpose of this study was to determine how global effort affects the rhythm of multi-joint coordination in the global task. We wanted to examine how this specific kind of fatigue impacts sense of rhythm.

Methods: In this study, fourteen non-professsional runners performed two effort trials of different intensity, where speed was set individually according to the speed of running when par- ticipants reached lactate threshold. Read More

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March 2019
3 Reads

Impact of modification with cetylpyridinium chloride - a potential cariogenic microbiota inhibitor, on selected physical-mechanical properties of the water-activated glass-ionomer.

Acta Bioeng Biomech 2018 ;20(4):19-24

Medical University of Łódź, Unit of General Dentistry of Department of Restorative Dentistry, Łódź, Poland.

Purpose: Teeth caries is one of predominant civilization diseases. Dental fillings with antimicrobial addition might allow prevention of secondary caries. The purpose of this study was to evaluate hardness and tensile strength of cetylpyridinium chloride modified water activated glass-ionomer cement. Read More

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March 2019
2 Reads

Effect of preservation methods on tensile properties of human femur-ACL-tibial complex (FATC) - a cadaveric study on male subjects.

Acta Bioeng Biomech 2018 ;20(4):31-42

Centre for Biomedical Engineering, Indian Institute of Technology (IIT) Delhi, New Delhi, India.

Purpose: Deep freezing and storing in formalin are some of the common techniques of human tissue preservation. However, the preservation modes affect the biomechanical properties of the tissues. In this work, the effects of the above-stated preservation tech- niques are compared with that of fresh cadaveric samples. Read More

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March 2019
22 Reads

Acute effects of core stability exercises on balance control.

Acta Bioeng Biomech 2018 ;20(4):145-151

Department of Biomechanics, Opole University of Technology, Opole, Poland.

Purpose: The aim of this study was to investigate whether a single bout of core stability exercises improves body balance immediately after the bout of exercise and during a retention test.

Methods: The study involved 16 women (age 22-25 years, body weight 60.5 ± 5. Read More

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March 2019
3 Reads

A simple method of incorporating the effect of the Uniform Stress Hypothesis in arterial wall stress computations.

Acta Bioeng Biomech 2018 ;20(4):59-67

Intelligent Systems for Medicine Laboratory, The University of Western Australia, Perth Australia.

Purpose: Residual stress has a great influence on the mechanical behaviour of arterial wall. Numerous research groups used the Uniform Stress Hypothesis to allow the inclusion of the effects of residual stress when computing stress distributions in the arterial wall. Nevertheless, the available methods used for this purpose are very computationally expensive, due to their iterative nature. Read More

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March 2019
3 Reads

Are the knee extensor and flexor muscles isokinetic parameters affected by the duration of postoperative physiotherapy supervision in patients eight months after ACL reconstruction with the use of semitendinosus and gracilis tendons autograft?

Acta Bioeng Biomech 2018 ;20(4):89-100

Division of Sports Medicine, Wrocław Medical University, Wrocław, Poland.

Purpose: The observational study evaluated isokinetic parameters in patients at eight months after anterior cruciate ligament reconstruction (ACLR) utilizing semitendinosus and gracilis tendons autograft, with two different modes of physiotherapy, and investigated whether analysed parameters were affected by the postoperative physiotherapy supervision duration.

Methods: Strict exclusion criteria were employed on a group of 259 ACL-reconstructed patients to identify two groups of males preoperatively well trained and frequently participating in sports, with different durations of postoperative physiotherapy supervision: Group I (n = 18; x = 27.67 weeks) and Group II (n = 20; x = 10. Read More

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March 2019
4 Reads

Influence of number of records on reliability of myotonometric measurements of muscle stiffness at rest and contraction.

Acta Bioeng Biomech 2018 ;20(4):123-131

Department of Kinesiology, Faculty of Physiotherapy, University School of Physical Education, Wrocław, Poland.

Purpose: The aim of this study was to determine an effect of myotonometric records' number on stiffness measurements' reliability in muscles at rest and contraction.

Methods: Muscle stiffness was measured using Myoton-3 device. Twenty records were taken for: (i) biceps (BB) and triceps brachii (TB) at rest and for BB at 10% of maximal voluntary contraction (MVC) in healthy elderlies (HE) and in Parkinson's disease patients (PD); and (ii) brachioradialis (BR) at rest and at 25, 50 and 80% MVC in healthy young (HY) subjects. Read More

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March 2019
3 Reads

Changes in electromyographic signals and skin temperature during standardised effort in volleyball players.

Acta Bioeng Biomech 2018 ;20(4):115-122

Józef Piłsudski University of Physical Education, Faculty of Physical Education and Sport, Department of Biomechanics and Computer Science, Biała Podlaska, Poland.

Purpose: The state of athletes' muscles is not constant, but it differs depending on the stage of sports training, which is associated with different degrees of muscle fatigue. There is thus a need to find a non-invasive and simple method to assess muscle fatigue. The aim of the study was to determine the relationship between muscle fatigue due to physical effort and changes in skin temperature, measured using a thermographic camera. Read More

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March 2019
5 Reads

Effects of physical exercise in winter training conditions on the thermographic temperature distribution of the horse rider's skin.

Acta Bioeng Biomech 2018 ;20(4):133-137

Department of Biomedical Engineering, UTP University of Science and Technology, Bydgoszcz, Poland.

Purpose: The purpose of this work was to assess the impact of a specific equestrian training, conducted in winter weather conditions, on the thermovision temperature distribution of a rider's body surface. The study included a riding pair with 12 years of experience (female rider, aged 25, sports active and 16-year-old horse, Trakehner breed).

Methods: The study included the temperature distribution of selected parts of the rider's body (the area of the right and left shoulder blade, chest and lumbar section, and the region of the left and right cross) was carried out before and after recreational, jumping and dressage training. Read More

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March 2019
4 Reads

Artificial neural network simulation of lower limb joint angles in normal and impaired human gait.

Acta Bioeng Biomech 2018 ;20(4):43-49

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

Purpose: Simulating the complexities of lower limb motion can be useful for orthosis or rehabilitation planning. The aim of this study was to develop an artificial neural network (ANN) able to accurately simulate the changes in the angle of the ankle, knee and hip joints during the gait cycle, then to use it to simulate the impact of a restricted range of ankle and hip joint angle changes on the progres- sion of the knee joint angle.

Methods: Thirty four young healthy students participated in the study. Read More

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March 2019
12 Reads

Concurrent validity and reliability of proprietary and open-source jump mat systems for the assessment of vertical jumps in sport sciences.

Acta Bioeng Biomech 2018 ;20(4):51-57

Department of Sport Sciences, University of Alicante, Ctra. San Vicente, Alicante, Spain.

Purpose: Vertical jump tests are used to assess lower-limb power of athletes in sport sciences. Flight time measurement with jump-mat systems is the most common procedure for this purpose. The aim of this study was to analyze the concurrent validity and reliability of two proprietary systems (Globus and Axon) and an open-source system (Chronojump). Read More

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March 2019
4 Reads

Human cancellous bone mechanical properties and penetrator geometry in nanoindentation tests.

Acta Bioeng Biomech 2018 ;20(4):153-164

Institute of Precision Mechanics, Departament of Mechanical Properties, Warsaw, Poland.

Purpose: The goal of the study was to determine the influence of the penetrator geometry on the human cancellous bone mechanical properties in indentation tests. The aim of this research was also the assessment of the material properties of bone structures, having in mind the energy aspects of the curve obtained in the cycle: inelastic loading and elastic unloading.

Methods: The samples were resected from a femoral heads of patients qualified for a hip replacement surgery. Read More

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March 2019
3 Reads

The effect of aging and gender on plantar pressure distribution during the gait in elderly.

Acta Bioeng Biomech 2018 ;20(4):139-144

Faculty of Sports Studies, Masaryk University, Brno, Czech Republic.

Purpose: The effect of age on structural foot characteristics as well as on the plantar pressure distribution has been shown previously. However, the number of studies focused also on gender gait differences of elderly is lacking. The purpose of this study was to compare dynamic gait characteristic in younger and older elderly and to investigate the gender differences as the life-long load and footwear choice differ in males and females. Read More

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March 2019
8 Reads

The influence of different composite mixtures (PLA/HA) manufactured with additive laser technology on the ability of S. aureus and P. aeruginosa to form biofilms.

Acta Bioeng Biomech 2018 ;20(4):101-106

Wrocław University of Science and Technology, Wrocław, Poland.

Purpose: Staphylococcus aureus (Gram-positive coccus) and Pseudomonas aeruginosa (Gram-negative bacterium) are the leading etiologic agents of biofilm-related, life-threatening infections in patients after orthopaedic implantations. The aim of the present paper is to estimate the ability of these two bacterial strains to form a biofilm on bioresorbable composites manufactured from polylactide (PLA) and hydroxyapatite (HA) with the use of Selective Laser Sintering (SLS) method.

Methods: Microbiological tests were conducted on two variants of a solid specimen made with additive laser technology. Read More

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March 2019
13 Reads

The influence of minimalist and conventional sports shoes and lower limbs dominance on running gait.

Acta Bioeng Biomech 2018 ;20(3):3-9

University of Ostrava, Faculty of Education, Department of Human Movement Studies, Ostrava, Czech Republic.

Purpose: The aim of this study was to determine how minimalist running shoes (MRS), conventional running shoes (CRS) and the dominance of lower limbs influence the running gait.

Methods: Trained recreational runners (N = 13) who have been engaged in regulary running for more than one year were participants in this study. They were experienced with using MRS and CRS for more than half year and they used both types of shoes. Read More

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March 2019
2 Reads

Knitted silk mesh-like scaffold incorporated with sponge-like regenerated silk fibroin/collagen I and seeded with mesenchymal stem cells for repairing Achilles tendon in rabbits.

Acta Bioeng Biomech 2018 ;20(4):77-87

Institute of Bioengineering, Zhejiang Academy of Medical Sciences, Hangzhou, Zhejiang Province, China.

A scaffold knit with natural sericin-free silk fibroin fiber possesses desirable mechanical properties, biocompatibility, ease of fabrication, and slow degradability. However, regenerated silk fibroin degrades faster than natural silk. In this study, natural silk fibroin fiber mesh-like scaffolds were prepared by a weft-knitting method and the pores were filled with sponge-like regenerated silk fibroin-collagen I. Read More

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March 2019
16 Reads

One step 3D printing of surface functionalized composite scaffolds for tissue engineering applications.

Acta Bioeng Biomech 2018 ;20(2):35-45

Technische Universität Dresden, Institut für Werkstoffwissenschaft, Max-Bergmann-Zentrum für Biomaterialien, Dresden, Germany.

their surface properties. A main challenge in this area is the development of processing routes enabling for a simple but efficient surface design of complex shaped geometries. Against this background, this work aimed at the implementation of self-assembly principles for surface functionalization of 3D-printed poly(lactic-co-glycolic acid) (PLGA)-based constructs with macro- and microporous geometries via precision extruding deposition. Read More

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January 2019

Effect of different balance training programs on postural control in chronic ankle instability: a randomized controlled trial.

Acta Bioeng Biomech 2018 ;20(2):159-169

Biomechanics Department, Faculty of Physical Therapy, Cairo University, Giza, Egypt.

Background: Chronic ankle instability (CAI) is a common sequence of ankle sprain. Conservative treatment of CAI is currently accepted as a primary mean of managing the condition and preventing of recurrence.

Objectives: The purpose of the current study was to evaluate the effect of Weight-bearing Exercise for Better Balance (WEBB) program and unilateral balance training exercises on postural control in females with CAI. Read More

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January 2019

How foot morphology changes influence shoe comfort and plantar pressure before and after long distance running?

Acta Bioeng Biomech 2018 ;20(2):179-186

Research Academy of Grand Health, Ningbo University, Ningbo, China.

Purpose: Prolonged running has been popularized globally in recent decades. This study was aimed to reveal information about foot morphology, shoe comfort and plantar loading among recreational heel-strike runners.

Methods: Twenty-six runners participated in foot morphology, perceived scores and peak pressure tests after 10- and 20-km track running. Read More

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January 2019

Surface analysis of long-term hemodialysis catheters made of carbothane (poly(carbonate)urethane) before and after implantation in the patients' bodies.

Acta Bioeng Biomech 2018 ;20(2):47-53

Department of Biomedical Engineering, Faculty of Mechanical Engineering, University of Zielona Góra, Zielona Góra, Poland.

Purpose: The vascular cannulation is associated with a number of complications. The aim of this work was to study the composition and distribution of the film covering the surfaces of Mahurkar Maxid and Palindrome catheters, which were removed from the body of long-term hemodialysis patients. Moreover, the roughness and contact angle of the catheters were evaluated. Read More

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January 2019

Pullout evaluation of sawbone experiment in different types of pedicle screws combined with bone cement augmentation for severe osteoporotic spine.

Acta Bioeng Biomech 2018 ;20(2):55-64

Department of Orthopedic Surgery, E-Da Hospital, I-Shou University, Kaohsiung, Taiwan.

Purpose: The conventional screw is unable to provide enough screw-bone interface strength for osteoporotic cencellous bone, and complications resulting from loosening or failure of the implants remain a significant clinical problem. Hence, the purpose of this study is to investigate pullout strength and energy in three types of the pedicle screws, including conventional solid pedicle screw, cannulated pedicle screw, and cannulated pedicle screw with a central pin, using osteoporotic sawbone test block with different bone cement volumes through pullout force testing.

Methods: The control group (n = 15) of the osteoporotic sawbone test block includes groups A, B, and C to reflect three types of the pedicle screws without bone cement augmentation. Read More

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January 2019

The assessment of the relationships between body posture indices and the Y-Balance Test results in the adolescents.

Acta Bioeng Biomech 2018 ;20(2):149-157

Department of Rehabilitation of the University School of Physical Education, Cracow, Poland.

Purpose: The purpose of this work was to assess the differences of the values of body posture indices, measured with the Moire's method, between girls and boys aged 13 and the relationships of these values with the results of the Y-Balance Test.

Methods: The study involved a group of healthy volunteers attending junior high schools in Cracow. The group consisted of 20 girls and 35 boys. Read More

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January 2019
1 Read

The influence of gender, dominant lower limb and type of target on the velocity of taekwon-do front kick.

Acta Bioeng Biomech 2018 ;20(2):133-138

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

Purpose: The current study aimed to quantify the main influences and the interactions (joint effects) of gender, leg and type of target on the biomechanics of front kick quality. Through the quantification, we tried to identify the relevant factors related to the kick accuracy and maximum velocity for coaching practice.

Methods: A ten-camera NIR VICON MX40 motion capture system (250 Hz) was used to determine the kicking foot maximum velocity from two well-trained subject groups (8 males and 6 females). Read More

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January 2019

Comparison of different suture techniques for Achilles tendon repair in rat model using collagen scaffolds.

Acta Bioeng Biomech 2018 ;20(2):73-77

University Medicine Rostock, Department of Orthopedics, Biomechanics and Implant Technology Laboratory, Rostock, Germany.

Purpose: Tendon injury is an increasing problem in orthopedic and trauma surgery due to aging of the population and increased activity demands. Many rodent animal models are used in order to evaluate tendon reconstruction. Although tendon reruptures are a well- -known clinical problem, the outcomes of tendon repair in animal models are rarely discussed in the literature. Read More

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January 2019
1 Read

Evaluation of relationship between the results of selected tests for muscle strength assessment of the hip abductors.

Acta Bioeng Biomech 2018 ;20(2):125-131

Orthopedic Rehabilitation Institute, Clinical Rehabilitation Division, Motor Rehabilitation Department, The Bronisław Czech University School of Physical Education, Cracow, Poland.

Purpose: The assessment of hip joint abductor muscle strength is most often carried out using a dynamometric test. However, both in clinical practice and literature, evaluation is performed by means of the single-leg half-squat or the amount of abduction movements performed in the hip joint. In this context, the question arises whether the results of individual tests are convergent. Read More

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January 2019

Leg strength and power in Polish striker soccer players.

Acta Bioeng Biomech 2018 ;20(2):109-116

Department of Biometry, Józef Piłsudski University of Physical Education, Warsaw, Poland.

Purpose: The main goal of the present study was to examine muscle strength and power of dominant and non-dominant leg, knee extensors and flexors, and their correlations with jumping performances in soccer players. A secondary aim was to evaluate muscle sense.

Methods: 31 male professional strikers (age 20. Read More

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January 2019
2 Reads

Influence of body posture on foot load distribution in young school-age children.

Acta Bioeng Biomech 2018 ;20(2):101-107

Department of Biomedical Engineering, Mechatronics and Theory of Mechanisms, Faculty of Mechanical Engineering, Wrocław University of Science and Technology, Wrocław, Poland.

Young school-age children are particularly prone to postural defects because they are in a period of development of the spine that is exposed to a number of factors impairing its normal growth. A change in the shape of the spinal column causes a shift in the centre of gravity. Therefore, this study attempted to assess the influence of body posture on distribution of the load transferred by the lower limbs. Read More

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January 2019

The use of the Gait Variability Index for the evaluation of individuals after a stroke.

Acta Bioeng Biomech 2018 ;20(2):171-177

Institute of Physiotherapy, University of Rzeszów, Rzeszów, Poland.

Purpose: The Gait Variability Index (GVI) summarizes overall gait quality, taking into account spatiotemporal parameters from a 3-dimensional gait analysis. However, there are no studies evaluating changes in gait patterns after stroke, based on the GVI. The study was designed to assess usefulness of the GVI for evaluation of gait pathology in subjects with stroke, compared to healthy individuals. Read More

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January 2019
2 Reads

Balance in handstand and postural stability in standing position in athletes practicing gymnastics.

Acta Bioeng Biomech 2018 ;20(2):139-147

Institute of Sport, Faculty of Physical Education and Sport, University School of Physical Education, Kraków, Poland.

Purpose: The aim of this study was to compare and analyse of relationships between stability indices registered in two positions: standing and handstand in athletes practicing gymnastics at various levels of advancement.

Methods: The study included 46 athletes practicing gymnastics. The research tool was posturograph CQ-Stab 2P. Read More

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January 2019

Thermovision analysis of surface body temperature changes after thermal stimulation treatments in healthy men.

Acta Bioeng Biomech 2018 ;20(2):79-87

Faculty of Physiotherapy, University School of Physical Education Wrocław, Wrocław, Poland.

Purpose: Among thermal stimulation treatments that have a beneficial effect on the human body general application of cold and various forms of massage are mentioned which can be assessed by means of thermovision analysis. The aim of the study was to evaluate changes in the distribution of surface body temperature under the influence of whole-body cryostimulation, classical massage and hot stone massage.

Materials And Methods: The study was conducted on a group of 40 men aged 20-24 years. Read More

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January 2019

Effect of porosity on the structure, mechanical properties and cell viability of new bioceramics as potential bone graft substitutes.

Acta Bioeng Biomech 2018 ;20(2):11-22

Yildiz Technical University, Faculty of Chemical and Metallurgy, Department of Metallurgy and Mater Engineering, Istanbul, Turkey.

Porous and alternative biografts for possible usages in orthopaedic applications were synthesized by the substitution of gelatin (G), cuttlefish backbone (C), meerschaum sepiolite (S) and hydroxyapatite (H). The effects of different proportions of the Gelatin substitutions on the mechanical properties and structure and cell viability properties of the fabricated biografts were investigated. Throughout the structure and mechanical evaluations, it was found that Gelatin substitution in the fabricated biografts increased the total porosity fraction, particularly for C13G75 and S13G75 biografts. Read More

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January 2019

Three-dimensional biomechanical modeling and simulation of trephine cutting cornea for keratoplasty.

Acta Bioeng Biomech 2018 ;20(2):23-33

School of Mechanical Engineering and Automation, Beihang University, Beijing, China.

Purpose: Trephination is one of the basic operations of keratoplasty, and the biomechanical mechanism of the operation can be revealed based on three-dimensional modeling and simulation of trephine cutting cornea.

Methods: Based on the analysis of the physical and biomechanical characteristics of corneal trephination, a three-dimensional numerical model of corneal trephination is built, where the cornea can be simplified to two layers structure including stroma and epithelium, and the trephine cuts the cornea under the vertical motion load and the rotational motion load. A three-dimensional failure criterion of corneal material is proposed based on the yield strength theory. Read More

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January 2019

Excessive tensile strain induced the change in chondrocyte phenotype.

Acta Bioeng Biomech 2018 ;20(2):3-10

Orthopedic Institute, Medical College, Soochow University, Suzhou, Jiangsu, China.

Purpose: Chondrocyte extracellular matrix type II collagen and proteoglycans ensure an important compression-bearing structure in synovial joint. However, much more type I collagen is generated in osteoarthritis, which implies the presence of abnormal tensile strain in cartilage. We hypothesize that tensile stress influences chondrocyte phenotype at the cellular level, leading to potential osteoarthritis. Read More

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January 2019

Quiet standing postural sway of 10- to 13-year-old, national-level, female acrobatic gymnasts.

Acta Bioeng Biomech 2018 ;20(2):117-123

Department of Human Motor Behavior, Jerzy Kukuczka Academy of Physical Education, Katowice, Poland.

Purpose: The aim of the study was to determine whether 10- to 13-year-old, national-level, female acrobatic gymnasts present a different quiet standing postural control (with and without visual cues) than untrained female peers.

Methods: The mean velocity of the center of pressure (in anterior-posterior and medial-lateral directions) was computed from 60-s long quiet-standing trials on a stationary force plate in fifteen 10- to 13-year-old female acrobatic gymnasts and thirteen sex- and age-matched non-athletes. A two-way repeated measures ANOVA (acrobatic gymnasts vs. Read More

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January 2019

Effects of magnetostimulation on muscle activity and pain in edentulous adults with temporomandibular disorders.

Acta Bioeng Biomech 2018 ;20(2):89-100

Department of Prosthetic Dentistry, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia in Katowice, Bytom, Poland.

Introduction: Multifactorial aetiologies of painful temporomandibular disorders (TMD) have an impact on correct diagnosis and consequently prevent proper treatment.

Aim Of The Study: The aim of the study was to evaluate the effect of magnetic stimulation on electromyographic activity in temporal muscles and masseters in patients using occlusal splints.

Materials And Methods: The examined group consisted of 40 edentulous patients with TMD. Read More

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January 2019
1 Read

The influence of osteoporotic bone structures of the pelvic-hip complex on stress distribution under impact load.

Acta Bioeng Biomech 2018 ;20(1):29-38

Department of Biomedical Engineering, Faculty of Mechanical Engineering, University of Zielona Góra, Zielona Góra, Poland.

Purpose: The aim of this study was to determine the effect of bone mineral density (BMD) on the stress distribution in pelvic-hip complex (PHC) model which included bone structures and soft tissues. Bone mass changes in osteoporosis and osteopenia were considered in this analysis. In addition, the relations between force direction and stress distribution causing PHC fractures were determined. Read More

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September 2018
4 Reads

Accelerometer profile of motion of the pelvic girdle in butterfly swimming.

Acta Bioeng Biomech 2018 ;20(1):159-167

Department of Biomechanics, Institute of Sport - National Research Institute, Warsaw, Poland.

Purpose: The aim of the study was to develop a method to measure and analyse kinematics of movement of the pelvic girdle in butterfly swimming in order to support training of technical skills.

Methods: A device for recording triaxial accelerations and triaxial rotational angular velocities was mounted on the dorsal part of the pelvic girdle of athlete. The measurements were performed in ten elite butterfly swimmers (age: 23. Read More

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September 2018
1 Read

Changes of albumin secondary structure after palmitic acid binding. FT-IR spectroscopic study.

Acta Bioeng Biomech 2018 ;20(1):59-64

Wrocław University of Science and Technology, Faculty of Fundamental Problems of Technology, Department of Biomedical Engineering, Wrocław, Poland.

Purpose: Albumin is an universal transport protein. Plasma pool of free fatty acids arising from triglyceride hydrolysis, critical in energy metabolism and etiology of metabolic disorders is transported by albumin. According to various studies albumin has from seven to nine binding sites with diverse affinity to long chain fatty acids. Read More

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September 2018

Preliminary assessment of vibration impacts generated by the public transport systems on pregnant women based on subjective reactions.

Acta Bioeng Biomech 2018 ;20(1):79-92

Cracow University of Technology, Poland.

Purpose: Research efforts summarised in this study were a part of preliminary investigation to evaluate the impact of pregnant women's exposure to vibrations generated by public transport system when using.

Methods: The assessment of the problem and discomfort for pregnant women, caused by the public transportation is based on a questionnaire including questions relating to the women's subjective feelings on well-being or discomfort when exposed to vibration during the ride in passenger cars or when using means of public transport. In the second stage of investigation, vibrations transmitted onto a sitting person during the tram or car ride were measured. Read More

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September 2018
2 Reads

The comparative study of influence of lactic and glycolic acids copolymers type on properties of daunorubicin loaded nanoparticles and drug release.

Acta Bioeng Biomech 2018 ;20(1):65-77

Moscow Technological University, Moscow, Russian Federation.

Purpose: The aim of this study was to compare the physico-chemical and biological properties of polymeric nanoparticles obtained from poly(DL-lactide-co-glycolide) (PLGA) with different ratios of monomers loaded with daunorubicin (DNR).

Methods: DNR-loaded nanoparticles (NPs) were prepared with use of modified simultaneous double-emulsion solvent evaporation/diffusion technique. NPs were characterized using dynamic light scattering, atomic force microscopy, transmission electron microscopy, scanning electron microscopy, and differential scanning calorimetry and Fourier transform infrared spectroscopy. Read More

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September 2018
3 Reads

The effect of trabecular bone storage method on its elastic properties.

Acta Bioeng Biomech 2018 ;20(1):21-27

University of Science and Technology, Mechanical Engineering Department, Bydgoszcz, Poland.

Purpose: The purpose of the study was to evaluate the effects of different methods of trabecular bone storage on changes in its elastic properties.

Methods: 186 porcine trabecular bone samples were divided into 6 groups, approximately 30 samples each. Five groups were stored using the following methods: in buffered 10% formalin solution at room temperature, frozen at -21 C, in the open air at room temperature, in 96% alcohol solution and in 50% alcohol solution at room temperature. Read More

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September 2018
1 Read

Gait changes in patients after reconstruction of facial bones with fibula and iliac crest free vascularized flaps.

Acta Bioeng Biomech 2018 ;20(1):185-190

Department Rehabilitation, The Children's Memorial Health Institute The Children's Memorial Health Institute, Warsaw, Poland.

Purpose: Patients with malignant tumours of the oral cavity require its surgical removal and reconstruction of the bone and soft tissues. The grafts are obtained either from leg (fibula) or pelvis (iliac crest). The removal of grafts from the locomotor apparatus can impair the gait. Read More

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September 2018
8 Reads

The differences between overground and treadmill walking in nonlinear, entropy-based and frequency variables derived from accelerometers in young and older women - preliminary report.

Acta Bioeng Biomech 2018 ;20(1):93-100

Palacky University Olomouc, Faculty of Physical Culture, Department of Natural Sciences in Kinanthropology, Olomouc, Czech Republic.

Purpose: The aim of this study was to compare gait stability and variability between walking conditions and age groups.

Methods: Twenty-six healthy younger and older females participated. Trunk acceleration in the vertical (V), medial-lateral (ML) and anteriorposterior (AP) directions during 5 minutes walking overground and 3 minutes walking on the treadmill at self-selected speed were recorded. Read More

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September 2018
5 Reads

Curve fitting problem: torque - velocity relationship with polynomials and Boltzmann sigmoid functions.

Acta Bioeng Biomech 2018 ;20(1):169-184

South-West University "Neofit Rilski", Department of Anatomy and Physiology, Faculty of Public Health, Health Care and Sport, University Center for Functional Research in Sports and Kinesitherapy, Blagoevgrad, Bulgaria.

Purpose: The aim of this study was to investigate the curve fitting and model selection problem of the torque-velocity relationship of elbow flexors and extensors in untrained females. The second goal was to determine the optimal models in different function classes and the best, among the optimal ones. Lastly, test the best models to predict the torque were tested. Read More

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September 2018
2 Reads

Countermovement depth - a variable which clarifies the relationship between the maximum power output and height of a vertical jump.

Acta Bioeng Biomech 2018 ;20(1):127-134

Institute of Sport - National Research Institute, Warsaw, Poland.

Purpose: The aim of this study was to identify the determinants of peak power achieved during vertical jumps in order to clarify relationship between the height of jump and the ability to exert maximum power.

Methods: One hundred young (16.8±1. Read More

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September 2018
7 Reads

Reference values of spatiotemporal parameters, joint angles, ground reaction forces, and plantar pressure distribution during normal gait in young women.

Acta Bioeng Biomech 2018 ;20(1):49-57

Chair of Bionics, University of Arts in Poznań, Poland.

Purpose: The aim of this study was to establish the reference values of spatiotemporal parameters, joint angles, ground reaction forces and plantar pressure distribution collected simultaneously on the same measurement path during normal gait in a homogenous group of young, healthy women.

Methods: The studied group consisted of 28 healthy women aged 21 years on average. The motion capture system BTS Smart-D, 2 AMTI force platforms and Footscan pedobarographic platform were used in this research. Read More

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September 2018
7 Reads

Determination of electrophysical and structural properties of human cancellous bone and synthetic bone substitute material using impedance spectroscopy and X-ray powder diffraction.

Acta Bioeng Biomech 2018 ;20(1):11-19

University Medicine Rostock, Department of Orthopaedics, Biomechanics and Implant Technology Research Laboratory Rostock, Germany.

Electrophysical stimulation is used to support fracture healing and bone regeneration. For design optimization of electrostimulative implants, in combination with applied human donor bone or synthetic bone scaffolds, the knowledge of electrophysical properties is fundamental. Hence further investigations of the structural properties of native and synthetic bone is of high interest to improve biofunctionality of bone scaffolds and subsequent healing of the bone defect. Read More

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September 2018