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Introduction
Ali Abbasi is an Associate Professor in Biomechanics at Shiraz University. He focuses his research on Artificial Intelligence in Biomechanics, Nonlinear Dynamic Analysis in Sports Biomechanics, coordination, coordination variability in repetitive human movements, Neuromechanics, and Gait analysis.
Current institution
Additional affiliations
January 2011 - July 2014
Position
- PhD Student
Description
- The Effects of Static and Dynamic Stretching of Lower Extremity Muscles on Kinematics and Muscular Activations Parameters Variability and Local Dynamic Stability during Pedaling in Healthy Active Young Males with Emphasis on Time Occasions
September 2005 - September 2007
Position
- Master's Student
Description
- The Relationship Between Maximum Torques Of Lower Extremity Muscles With Anterior Knee Shearing Force During Single Leg Drop Landing
Education
January 2011 - July 2014
September 2005 - September 2007
January 2002 - May 2005
Publications
Publications (112)
Measuring the gait variables outside the laboratory is so important because they can be used to analyze walking in the long run and during real life situations. Wearable sensors like accelerometer show high potential in these applications. So, the aim of this study was continuous estimation of kinetic variables while walking using an accelerometer...
Measuring and predicting accurate joint angles are important to developing analytical tools to gauge users' progress. Such measurement is usually performed in laboratory settings, which is difficult and expensive. So, the aim of this study was continuous estimation of lower limb joint angles during walking using an accelerometer and random forest (...
The aim of the present study was to predict the kinematics of the knee and the ankle joints during a squat training task of different intensities. Lower limb surface electromyographic (sEMG) signals and the 3-D kinematics of lower extremity joints were recorded from 19 body builders during squat training at four loading conditions. A long-short ter...
Background: Numerous studies have examined the risk of non-contact anterior cruciate ligament (ACL) injuries during fast sports activities involving cutting maneuvers. However, these studies often focus on isolated measurements. A critical factor influencing this risk is the anticipation of the cutting movement.
Objective: This study aimed to compa...
This study was aimed to compare the variability of inter-joint coordination in the lower-extremities during gait between active individuals with transtibial amputation (TTAs) and healthy individuals (HIs). Fifteen active male TTAs (age: 40.6 ± 16.24 years, height: 1.74 ± 0.09 m, and mass: 71.2 ± 8.87 kg) and HIs (age: 37.25 ± 13.11 years, height: 1...
Background and Aims Several treatments have been recommended to enhance the running mechanics of individuals with flat feet. Less emphasis has been paid to the impact of these treatments on the ground reaction forces (GRF) and the center of pressure (COP), while these kinetic effects are essential in identifying possible injuries and the body’s com...
Background and Aims Pyramid and reverse pyramid loading patterns are used to increase the training load in resistance training. Although physiological studies have attempted to compare the two patterns, the difference between the two loading patterns on the biomechanics of the spine and pelvis has not been determined. This study aimed to investigat...
The purpose of this study was to examine the effects of rowing stroke rates on lower extremity intra-joint coordination variability in professional rowers. Fifteen experienced young rowers volunteered to participate in this study. Kinematic data were recorded at different rowing speeds with seven Vicon cameras. The continuous relative phase (CRP) a...
Core stability is the ability to control the position and motion of the trunk over the pelvis and legs to allow the optimum production and transfer of force to the terminal segment in sporting activities. The effect of fatigue, especially core muscle fatigue, on stiffness as a performance index requires more study. This research aimed to investigat...
The smooth interaction and coordination between lower-limb amputees and their prosthetics is crucial when
performing complex tasks such as running. To address this, simultaneous and proportional control (SPC) based
on continuous estimation of joint angles through surface electromyogram (sEMG) signals offers a more seamless
interaction between us...
Introduction: Optimizing strategies to reduce the negative effects of lifts on low back pain (LBP) have attracted the attention of researchers. One of the practical strategies to deal with the effects of loads on the spine is lumbar belts. The aim of this study was to investigate the effect of lumbar belts on the coordination variability of spine a...
Objective:
The objective of this study was to examine the effects of fatigue on the coordination variability between the trunk, pelvis, and hips during treadmill running.
Methods:
The kinematics data were recorded during ten successive treadmill steps running at the preferred speed and at 80% and 120% of the preferred speed. The angle segment da...
مقدمه و هدف: حس عمقی به عنوان توانایی یکپارچه کردن اطلاعات حسی در جهت بهبود آگاهی پوسچرال و حس حرکتی تعریف می شود. نقص های عصبی عضلانی با برهم زدن ثبات مفصلی، حس عمقی را دچار اختلال می کنند. هدف از پژوهش حاضر، بررسی تأثیر هشت هفته تمرینات تکالیف دوگانه بر حس عمقی بازیکنان فوتسال با نقص غلبه لیگامانی زانو است.
روش شناسی پژوهش: 30 بازیکن فوتسال مبتلا...
Purpose: Most anterior cruciate ligament (ACL) injuries occur when the athlete's attention is focused on performing tasks and cognitive challenges. Dysfunction of the performance and proprioception of the knee joint in the condition of divided attention exposes a person to ACL injury. Therefore, the purpose of this study was to investigate the effe...
Background
The performing of jump and landing in futsal simultaneous with divided attention is one of the most common mechanisms of non-contact anterior cruciate ligament (ACL) injury. Neuromuscular training has effectively reduced the risk of ACL injury, but the effect of neurocognitive training has received less attention. This study investigated...
Original Article Abstract Purpose: The aim of this study was to evaluate neural (IEMG and RMS) and functional indexes after three weeks of Small Sided Game (SSGs) with continuous and interval blood flow restriction (BFR). Methods: Eighteen futsalists (age 22.67 ± 1.14 years) were divided into three groups without BFR (n=6), BFR (n=6), and interval...
This study aimed to investigate how facilitatory and inhibitory KT of the Vastus Medialis affected the activation and the fatigue indices of VM, Vastus Lateralis (VL) and Rectus Femoris (RF) throughout a dynamic fatigue protocol. Seventeen collegiate athletes (Ten males, seven females, age: 24.76 ± 3.99 years, height: 1.73 ± 0.10 m, mass: 68.11 ± 8...
Background
Pes Planus or Flat feet is one of the most common lower limb abnormalities. When runners with this abnormality participate in recreational running, interventional therapies could help in pain alleviation and enhance performance. To determine the most effective treatment, however, a biomechanical examination of the effects of each treatm...
Background and Aims: Pyramid and reverse pyramid loading patterns are used in resistance training to increase the training load. Although physiological studies have attempted to compare the two patterns, the difference between the two loading patterns on the biomechanics of the spine and pelvis has not been determined. The aim of this study was to...
Background and Aims: Hypermobility is defined as a condition in which many synovial joints move beyond their natural range of movement. Since hypermobile individuals participate in athletic activities, identifying their functional differences with healthy people and the likelihood of injury can help planning suitable exercises for them. The purpose...
The present study aimed quantify the variability of segmental coordination, during the gait of young practitioners and sedentary people on different slopes (Horizontal, 8% and 10% Upward (Up) and Downward (Down) conditions) maintaining the self-selected speed (VAS), using the Vector Coding technique. Thirty young people participated in this study,...
The aim of the present study was to quantify the variability coordination of Thigh-Leg segments, during gait, of young sedentary and active at different speeds (preferred walk- ing speed (PWS), 120% of PWS and 80% of PWS) using the previously reported modified Vector Coding technique, to record the segmental angles. Thirty young people participated...
The aim of this study was to analyze the variability of coordination during gait of sedentary young people and practitioners of physical activities, at different speeds (Preferred walk speed (PWS), 120% of PWS and 80% of PWS) using the Vector Coding technique (VC). Thirty young people participated in this study, of which 15 are sedentary and 15 pra...
Introduction: Low back pain is one of the most common musculoskeletal disorders leading to disability around the world. Several studies have suggested that prolonged computer/ laptop work contributes to the development of low back pain and discomfort. The results of the studies conducted on the association of back discomfort and muscle activity are...
Introduction: Low back pain is one of the most common musculoskeletal disorders leading to disability around the world. Several studies have suggested that prolonged computer/ laptop work contributes to the development of low back pain and discomfort. The results of the studies conducted on the association of back discomfort and muscle activity are...
Background: Stability is one of the key demands in human locomotion including running. Various kinematical analytical approaches are adopted to investigate the running strategies; nevertheless, the impacts of running speeds on the variability of angles in individual lower limbs joints is still unclear.
Objective: This study was aimed to investigat...
Introduction: The purpose of this research was to compare the coordination variability of lower extremity segments in men with genu varum and healthy men during treadmill running at different speeds . Materials and Methods: Among sports and physical education students, 15 healthy men and 15 men with genu varum voluntarily participated in this resea...
Introduction: The purpose of this study was to determine the effects of different rates of rowing stroke on kinematics of lower extremity joints related to overuse injuries in professional teenager rowers. Materials and Methods: 15 elite young rowers volunteered to participate in this study. Lower extremity kinematic data were recorded during incre...
Background: Adaptation of the walking pattern to uphill walking demands immediate coordination between the lower limb segments. Nonetheless, knowledge about individual joints’ responses and variability in response to the new slope angles are missing.
Aims: This study investigated the impacts of uphill walking on the ankle, the knee and the hip join...
Falling is one of the most common causes of hip fracture and death in older adults. A comparison of the biomechanics of the gait in fallers and non-fallers older adults, especially joint coordination and coordination variability, enables the understanding of mechanisms that underpin falling. Therefore, we compared lower-extremity intra-joint coordi...
The aim of this study was to compare the spine-pelvis coordination and coordination variability (CV) during rowing in elite rowers with and without chronic low back pain (CLBP). Fourteen professional rowers (6 healthy and 8 with CLBP) participated in this study. 3D kinematic of upper trunk (UT), lower trunk (LT), lower back (LB), and pelvis segment...
Context:
Chronic ankle instability is documented to be followed by a recurrence of giving away episodes due to impairments in mechanical support. The application of ankle Kinesiotaping (KT) as a therapeutic intervention has been increasingly raised among athletes and physiotherapists.
Objectives:
This study aimed to investigate the impacts of an...
Background: The purpose of this study is to examine the lower extremity intra-segment coordination and variability of road cyclists during pedaling at different intensities. Methods: Eleven semi-professional road cyclists perform four trials at workloads of 50%, 75%, 100%, and 125% of their maximum power output in a randomized order. Thigh, shank,...
The present study aimed quantify the variability of segmental coordination, during the gait of young practitioners and sedentary people on different slopes (Horizontal, 8% and 10% Upward (Up) and Downward (Down) conditions) maintaining the self-selected speed (VAS), using the Vector Coding technique. Thirty young people participated in this study,...
The aim of the present study was to quantify the variability coordination of Thigh-Leg segments , during gait, of young sedentary and active at different speeds (preferred walking speed (PWS), 120% of PWS and 80% of PWS) using the previously reported modified Vector Coding technique, to record the segmental angles. Thirty young people participated...
The purpose of this research was to continuous knee joint angle estimation from sEMG during squat using artificial neural networks. sEMG signals of vastus medialis, rectus femoris, biceps femoris and 3D kinematics of lower extremity joints for four participants during squat were captured at 1500 Hz and 100 Hz, respectively. sEMG signals were prepro...
The aim of this study was to analyze the variability of coordination during gait of sedentary young people and practitioners of physical activities, at different speeds (Pre-ferred walk speed (PWS), 120% of PWS and 80% of PWS) using the Vector Coding technique (VC). Thirty young people participated in this study, of which 15 are sedentary and 15 pr...
Aims
Athletes are always seeking to improve their motor skills and abilities to achieve better records. The complex interaction of biomechanical, physiological, psychological, and bio-motor factors are necessary to achieve optimal performance of sports skills (1). Having this optimal physical fitness is the key to success in many sports, such as sk...
Laptop work may increase risks of neck and back injuries in the long term due to awkward postures and increased mechanical loads on cervical and lumbar spine. This study was intended to compare the muscle activities and postural changes as well as discomfort of the neck and back resulted from the laptop work in a conventional and adjusted setup. 20...
Purpose: In spite of mounting evidence indicating that concentric and eccentric knee extensor muscle
contractions might have special nervous system control strategies, the differentiation of brain frequencies
between concentric and eccentric movements and how the motor cortex programs this contraction has been
less studied. In this study, the brain...
زمینه و هدف: نتایج پژوهش ها بیانگر آن است که برنامه های پیشگیری از آسیب لیگامان صلیبی قدامی در کوتاه مدت موفقیت آمیز بوده اند. استراتژی های یادگیری حرکتی با تمرکز درونی برای حرکات بدن به صورت سنتی استفاده شده اند اما این احتمال می رود در مقایسه با تمرکز بیرونی در اکتساب و کنترل مهارت های حرکتی پیچیده مورد نیاز ورزش ها مناسب نباشند. هدف این پژوهش بر...
Background: Walking impairment is one of the most reported symptoms of Multiple Sclerosis (MS). The documentation of gait impairments is important for indexing disease progression and rehabilitation in MS. By measuring and comparing relevant parameters based on the Center of Pressure (COP) patterns, this study aimed to characterize the execution of...
Introduction: Falling is a serious concern among the elderly which have made a lot of discussions between gerontologists and physical therapists. Falling is common, dangerous, and costly among the elderly population. Fear of falling again among elderly faller leads to decrease self-confidence, loss of life quality, and inability. The purpose of thi...
Background
Recently, the use of treadmills for walking and running has increased due to lifestyle changes. However, biomechanical differences in coordination between running on a treadmill or overground have not been adequately addressed.
Research question
The purpose of this study was to compare coordination and its variability in lower limb segm...
Introduction: Pain and overuse injuries of the knee joint is prevalent among cyclists. The bicycle adjustment in accordance with the cyclist’s body mechanics is a common way to reduce the risk of overuse injuries. The aim of this study is to investigate the effect of changes in bicycle pedal width on the kinematics of segments and joints of lower e...
The aim of this study was to examine effects of a task intervention on kinematic synergies in catching. Participants were young children (5.58 ± 0.52 years) with the lowest scores on two-hand catching, according to assessments with the Test of Gross Motor Development-2 (TGMD-2) and were allocated into two groups. The constraints group took part in...
Aims and background: People with low back pain represent impaired anticipatory postural adjustments.The
aim of this study was to investigate The effects of sensorimotor training on proprioception and anticipatory
postural adjustment of the some trunk muscle of subject with non-specific chronic low back pain.
Materials and methods: The present study...
Purpose: The aim of this study was to evaluate neural (IEMG and RMS) and functional indexes after three weeks of Small Sided Game (SSGs) with continuous and interval Blood Flow Restriction (BFR).
Methods: Eighteen futsalists (age 22.67 ± 1.14 years) were divided into three groups without BFR (n=6), BFR (n=6), and interval BFR (n=6). An electromyogr...
Background and Aim: Direct and indirect complications of diabetic peripheral neuropathy can lead to imbalance and falls, and it may increase the risk for plantar ulcer. Therefore, performing effective trainings to increase balance probably reduces the risk of falling in these patients. Thus, the aim of the present study was to investigate the effec...
Researchers have reported contradictory results on the effect of static and dynamic stretching on subsequent performance. Due to the importance of performance through static and dynamic stretching, the aim of this study is to investigate the acute effects of static and dynamic stretching protocols on local dynamic stability in lower extremity joint...
ackground and Aim: Impingement syndrome is the most common injury and causes for pain and limitation of movment in the shoulder area. The purpose of this study was to compare the electromyographic activity of selected shoulder muscles and scapulohumeral rhythm in elite men swimmers with and without the shoulder impingement syndrome.
Materials and M...
The aim of this study was to investigate the effect of leg blood flow restriction (BFR) applied during a 3-a-side futsal game on strength-related parameters. Twelve male futsal players were randomly assigned into two groups (n=6 for each group) during 10 training sessions either with or without leg BFR. Prior to and post training sessions, particip...
Background and Objective: Genu varum is one of the most common knee deformities, which can cause changes in the forces of the body and the way the muscles of the lower limbs function due to changes in the mechanical axis of lower limb. The aim of this study was to investigate ground reaction forces and electromyography muscle activity of lower extr...
حرکتی بهینه در طول جلسات تمرینی جهت رسیدن به حرکات خودکار مورد نیاز فعالیت های ورزشی می باشد. استراتژی های آموزشی با تمرکز درونی
توجه به صورت سنتی مورد استفاده قرار گرفته و در اکتساب کنترل مهارت های حرکتی پیچیده بهینه نبوده اند. برعکس، استراتژی های آموزشی با
تمرکز بیرونی توجه می تواند اکتساب مهارت را به طور موثر تقویت کند و انتقال مهارت حرکتی بهب...
Introduction: The aim of this study was to investigate the effect of fatigue on electromyography activity of biceps femoris, gastrocnemius and soleus muscles of soccer players.
Materials and Methods: In this study timing and electromyography activity of biceps femoris, medial gastrocnemius and soleus of soccer players (15 subjects) during differen...
Objectives:
Comparison of the effects of six weeks sensorimotor and sensorimotor with passive interventions programs on pain, electromyography (EMG) and kinematics in patients with scapular downward rotation syndrome (SDRS).
-Design:
Randomized Controlled Trial.
-Setting:
Institutional practice.
-Participants:
140 active subjects with unilateral SD...
Background and Aim: Knowing the changes of lower limb joint angles during landing result in good fundamental understanding to prevent Knee injuries in people with flatfeet. Hence, the purpose of this study was to compare of lower limb angles as ACL risk factor during single leg drop landing between athletes with flatfeet and normal.
Materials and...
Introduction: The spinal loads depend on moment arm of the object, and regardless of the lifting technique, it can be effective in reducing the risk of low back pain. However, thoracic kyphosis variations during lifting can affect the moment arm of the external load.
Materials and Methods: In this study 12 men volunteers recruited for lifting a bo...
Background and Aim: Previous studies about the effect of static and dynamic stretching on forthcoming performance have been reported different results. In present study, it has been evaluated the effects of these two stretching on lower extremity muscular electrical activity using innovative nonlinear analysis methods. The purpose of present study...
Introduction: Proprioception (PP) and balance play a significant role in improving performance and preventing acute and chronic sport injuries. Muscle fatigue can be one of the factors that may interfere with signaling sensory input to the brain, and disturb the balance. The effect of muscle fatigue on this sensation has hardly been studied. The ai...
Background&Purpose: Genu varum deformity is known as a factor disrupting gravity line and force pattern in lower limb that can cause disorder in posture control and the increase of injury while doing sports. This study investigated the effect of genu varum deformity on posture control index during walking and running.
Material and Methods: Thirty a...
Background and Aim: Patients with chronic mechanical low back pain experience disorder in proprioception and sensory acuity and these disorders are associated with pain in these patients. The aim of the present study was to compare the effectiveness of motor control exercises, exercise in water, and combined exercises on proprioception, sensory acu...
Objectives: Genu Varum deformity is known as a factor disrupting gravity line and force patterns in lower limb and may make the individual more exposed to lower extremity injuries especially in repeated activities like running. The aim of this study was to investigate Ground Reaction Forces in subjects with and without genu varum deformity during r...
Introduction: Previous studies indicated that anterior cruciate ligament demage prevention programs have been successful in the short term. Motor learning strategies with an internal focus (IF) to body movements have traditionally been utilized, but may be less suitable than an external focus (EF) for the acquisition and control of complex motor sk...
Background and Aim: mal-alignment of lower extremity especially at the, aligned with the change of gravity line passing the lower limb joints can cause disorders in neuromuscular control of muscles around the joints and increase the risk of injury during sport activities. Therefore the aim of present study was to evaluate the effects of genu varum...
Introduction: mal-alignment of lower extremity especially at the, aligned with the change of gravity line passing the lower limb joints can cause disorders in neuromuscular control of muscles around the joints and increase the risk of injury during sport activities. Therefore the aim of present study was to evaluate the effects of genu varum deform...
Introduction: Plyometric exercises (PE) cause muscles to exert maximum strength during shortest possible time and the basis of these exercises is stretch-shorten cycle in muscular contraction (1). Whole Body Vibration Training (WBVT) has been introduced recently and it is believed that it has the same effects as PE in shortest time (2). During thes...
Introduction: Dynamic postural control in daily activities and sports is necessary and decisive. Injuries were more common with poor postural control is impaired it can lead to an increased risk of injury during sport activities. Assessment of postural control, an important tool for determining levels of neuromuscular performance athletes as well a...
Introduction: Stiffness is a mechanical properties of viscoelastic structures which researchers have believed it has three important function in body mechanism: it adjusts rate of force development in system, determine force storage capability for stretch-shorten cycle, and determine system resistant against perturbations (system stability). Theref...
Background and Aim: Anterior Cruciate Ligament (ACL) injury is one of the prevalent injuries among wrestlers. ACL reconstruction surgery with hamstring tendon (HST) is one of the common treatments of this injury. Physicians continue to prescribe prophylactic knee brace after ACL reconstruction and rehabilitation, but the effectiveness of brace on p...
Introduction: Malalignment of the lower extremity, especially at the knee, can lead to injury due to its impact on muscle activity. Therefore, the aim of the present study was to compare the pattern and activity of selected muscles of the lower extremity in athletes with genu varum and healthy athletes during running.
Materials and Methods:The pre...
Previous studies about the effect of static and dynamic stretching on forthcoming performance have been reported different results. The purpose of present study was to examine the effects of acute static and dynamic stretching on kinematics and EMG variability of lower extremity joints and Muscles in healthy active males during pedaling. Fifteen ph...
Introduction: The aim of this study was to investigate the Effect of CST90 fatigue protocol on timing and electromyography activity of gluteus medius muscle of soccer players
Materials and Methods: This is an intragroup study. Timing and electromyography activity of gluteus medius of soccer players (15 subjects, Mean ± SD: Age (yr): 25.4±3.8, Heig...
Purpose: Anterior Cruciate Ligament (ACL) tear is a common injury among wrestlers. One of its treatments is reconstructive surgery with Hamstring Tendon (HST) autograft. This research aimed to examine the effect of neoprene knee brace on the knee kinetics variables of elite wrestlers after ligament reconstructive surgery with hamstring autograft.
M...
Background and Aim: The previous studies on the effect of statics and dynamics stretching on forthcoming performance have reported various results. The purpose of the present study was to examine the effects of static and dynamic stretching types of muscles on local dynamic stability in angular displacement of the lower extremity joints in active m...
The purpose of this study was done to compare the static balance with the dynamic one and their relationship with the anthropometrical characteristics in the athletes of selected sports. 50 healthy athlete students (16 handball players, 9 basketball players, 15 futsal players and 10 volleyball players) who had participated in the sport events of Az...
The purpose of this study was done to compare the static balance with the dynamic one and their
relationship with the anthropometrical characteristics in the athletes of selected sports. 50 ealthy athlete students (16 handball players, 9 basketball players, 15 futsal players and 10 volleyball players) who had participated in the sport events of Aza...
Introduction: Since disorders in neuromuscular performance and imbalance consider as main cause of falling among the elderly, their aspects including rehabilitation of balance is the main concern the researchers attend to. The aim of this study was to determine the effects of eight weeks aquatic balance training and detraining on neuromuscular perf...
The purpose of the present research was to study the effect of eight weeks Aquatic balance training (ABT) and core stabilization training (CST) on dynamic balance in inactive elder males. Thirty inactive elder males voluntarily participated in this research and randomly divided into three groups of ABT, CST and control (N=10 per groups). The Y-Bala...
The purpose of the present research was to study the effect of ten weeks Aquatic balance training (ABT) and functional training (FT) on dynamic balance in inactive elder males. Forty inactive elder males voluntarily participated in this research and randomly divided into three groups of ABT (N=13), FT(N=14) and control (N=13). The Y-Balance Test wa...
Governments play a basic role in making policies, programs and instruments that support the development of micro, small and medium enterprises in both developed and developing countries. This paper intends to pinpoint the influencing factors in Technology Business Incubator's effectiveness and their explanatory model. Therefore, among 56 Technology...
The purpose of this study was to examine gender differences in peak vertical Ground Reaction Force (VGRF) and Rate of Loading (ROL) during stop-jump task. Forty four healthy students 22 males (weight 75.89 ± 3.22 kg, height 177.84 ± 4.52 cm, age 24 ± 3 years) and 22 females (weight 64.17 ± 2.85 kg, height 164.20 ± 5.58 cm, age 22 ± 2 years,) from k...
The purpose of this study was to investigate the effect of whole body vibration training (WBVT) with creatine supplementation on some fitness factors in healthy male. 60 healthy male students were selected randomly and were assigned in four groups: 1: WBVT with creatine supplementation 2: WBVT with placebo consumption, 3: WBVT without supplementati...
The purpose of the present research was to study the relationship between peak torques of lower extremity muscles with anterior knee shearing force (AKSF) during single-leg drop landing. 22 healthy male student athletes voluntarily participated in the research. The peak torque of the quadriceps, hamstring and soleus of the subjects was measured usi...
The aim of this study was to compare the peak Vertical Ground Reaction Forces (VGRF) and Rate of Loading (ROL) between supinated, pronated, and normal feet during single leg drop-landing. Thirty healthy male students from physical education & sport sciences department participated in this study and assigned to one of three groups by navicular drop...
The aim of this study was to determine the effects of eight weeks whole body vibration training (WBVT), aquatic balance-and combined-training on neuromuscular performance, balance and walking ability in male elderly able-bodied individual. Sixty adult male subjects voluntarily participated in WBVT, aquatic balance-and combined training. Timed Up an...
Questions
Questions (6)
Dear colleagues
I have a question about using Statistic Parametric Mapping (SPM) methods on biomechanics time series data.
I want to use this method to compare kinematics time series data between two different groups. When I run SPM on 100 data points, there are no significant differences in any phases of the gait cycle. However, when I split the time series to ten parts with 10 data points in each part and run SPM on each split phase, I can see significant differences in some phases.
Which model is correct?
Because the motion analysis systems are very expensive, I want to use simple video cameras with high sampling frequency for sports and exercises kinematics analysis. There are some free software likes “Kinovea” and “SkillSpector” for tracking the films. But the process of tracking is very time consuming and there are much user errors during tracking the landmarks. I am looking for an automatic motion analysis software. I appreciate that someone introduce an automatic motion analysis software.
Regards
I need a free software to simulate athletic movements, for example parallel movements in gymnastics. I will be appreciate that someone help me about this matter.
Dear colleagues
We have a MIE Gait analysis system in our biomechanics lab and we want to capture spatio-temporal gait parameters by motion capture and foot switch. Is anybody has been worked by this system? If yes, please tell us about foot switch connection to gait analysis system and about adjusting the gain of foot switch and more. Also we need to know about data which foot switch provide for us and the analysis of this data. I appreciate if anybody could explain these matter by photo or video to us.
I am waiting to hear good guide from you.
Best Regards
Hi
I have a question about forces component in pennate musles.
In pennate muscles, the forces produce in muscle fibers should transform into two component of horizontal and vertical. The vertical component acts in tendon direction and will shorten the length of pennate muscle. But what is the role of horizontal component? Is this force wasted? Does it do some specific task?
Does anyone have a matlab m-file for calculation of time delay in time series data?
