عباس رحیمی
استاد گروه فیزیوتراپی، دانشکده علوم توانبخشی، دانشگاه علوم پزشکی شهید بهشتی، تهران، ایران
[ 1 ] - تأثیر سرعت حرکت بر تقارن کینماتیکی بین اندام‌های تحتانی هنگام راه رفتن طبیعی: مطالعه مقدماتی
مقدمه و اهداف از آنجا که تغییر در سرعت حرکت می‌تواند اثر قابل‌توجهی بر ویژگی‌های بیومکانیکی راه رفتن داشته باشد، هدف از انجام تحقیق حاضر، مطالعه چگونگی تغییر تقارن حرکت بین اندام‌های تحتانی حین راه رفتن طبیعی با سرعتهای مختلف از دیدگاه کینماتیکی بوده است. مواد و روشها 11 پارامتر زاویه‌ای و 8 پارامتر زمانی نمودار زاویه زمان سطح سجیتال مفاصل اندام تحتانی 10 مرد جوان فعال در سه سرعت حرکت (آهس...
[ 2 ] - Selected Kinematic Characteristics Analysis of Knee and Ankle Joints During Block Jump Among Elite Junior Volleyball Players
Purpose: The present study examined selected kinematic characteristics analysis of knee and ankle joints during block jump in elite junior volleyball players. Methods: Thirty male junior elite volleyball players (Mean±SD age: 18.14±1.12 y, height: 197.10±3.16 cm, sports history: 4.39±0.95 y, & weight: 771.20±59.83 N) participated in this study. A time-synchronized 5-camera sampling at 100 Hz w...
[ 3 ] - Effects of Instantaneous Insole on Balance Performance of Adolescents with Flat Foot and Pescavus
Objective: According to the Biomechanical viewpoint, Foot is the functional unit to maintain a balance and transfer the body weight to the ground as well as preparing a lever system for body motion. The purpose of this study is the impact of instantaneous insole on Balance performance of Adolescents with a flat foot and Pes cavus. Methods: 65 Adolescents of Tehran City (11-14 years old) volunta...
[ 4 ] - Comparative Analysis of Jumping and Landing Velocity of the Young Elite Spikers of the Iranian National Volleyball Team While Performing Block Jump
Objective: Accurate velocity analysis is essential when performing the block jumping technique on the net by various spikers because it will improve this performance and prevent injury. This study aimed to compare the jump and landing velocity of the Iranian national team’s young elite spikers when performing block jump skills. Methods: A total of 21 young elite male volleyball players of the...
[ 5 ] - A Comparative Study of Plantar Arch Index, Weight Distribution, Equilibrium Performance, and Selected Musculoskeletal Disorders in Active and Non-active Adolescences
Objective: musculoskeletal disorders cause the loss of beauty and decrease the mechanical performance of individuals. The functions of the steps on the floor are the attraction and distribution of forces and the provision of the body’s stability. The study aimed to compare arch index, weight distribution, balance, and selected musculoskeletal disorders in active and non-active adolescents. Met...
[ 6 ] - Comparison of Motor Skills and Postures of Elite Male Teenage Volleyball and Basketball Players
Objective: To achieve the excellent levels of athletic performance, professional athletes need to do continuous exercises and strengthen special muscles of the body and have to spend a lot of time training in that sport. As a result, depending on the prevailing condition of each sport, the physical orientation and the degree of abnormalities of the athletes in that sport are affected. Methods:...
[ 7 ] - Block Jump Height Assessment Based on Kinetic Approach in Volleyball Players: Is There any Difference Between Methods?
Purpose: Various kinematics and kinetics methods have been proposed for the assessment of jumping ability as a critical skill in professional volleyball players, but little is known about the accuracy and differences between these methods. Therefore, the objective of the current study was to answer the question “Is there any difference between the results of various kinetic methods in the asses...
[ 8 ] - The Effect of Combined and Core Stability Training Program with Protective Measures on Selected Variables of Physical Fitness of Junior and Young Volleyball Players during the Coronavirus Pandemic
Objective: The aim of this study was to investigate the effect of a combined and core stability training program with protective measures on selected variables of physical fitness of junior and young volleyball players during the coronavirus pandemic. Methods: 15 male volleyball players [18±1.06 yrs.] after the end of the first quarantine period and then after a 12 weeks period of combined an...
[ 9 ] - A Kinetic Based Analysis of the Lower Limb’ Joints with Increasing Running Speed
Purpose: Due to the paucity of the information regarding the lower limb biomechanics in slow speeds running as well as concentration of the majority of previous studies in a single movement plane, aim of the present study was investigation on a kinetic based analysis of lower limb’ joints with increasing running speed. Methods: 28 runners asked to stay on the belt speed of treadmill that was ...
[ 10 ] - Comparison the Effect of Neuromuscular Exercises with Other Training Modalities on Balance and Motor Function in People with Chronic Ankle Instability: A Systematic Review and Meta-Analysis
Background and aim. Identifying the factors affecting the reduction of ankle sprain complications as well as rapid recovery and prevention of re-injury after ankle sprain occurs are considered as the essentials. Therefore, the present meta- analysis investigate the challenge that which training modalities have a better effect on the balance and motor function of people with chronic ankle instab...
[ 11 ] - The Effects of Increasing Running Speed on Three-Dimensional Peak Angle of the Lower Limb Joints in Stance Phase
Objective: Attention can be paid to the biomechanical characteristics of running since the speed of running varies. The aim of the present study was to investigate the effects of increasing running speed on the three-dimensional kinematics of the lower limb’ joints in the stance phase. Methods: The research was quasi-experimental. 27 volunteer subjects ran on a treadmill and the kinematic and ...
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