نتایج جستجو برای: leg stiffness
تعداد نتایج: 92261 فیلتر نتایج به سال:
Objective: A better understanding of the role of muscle fatigue in lower limb stiffness during performance will provide a strong foundation for the development of optimal training intervention programs. This study aimed to investigate the effect of fatigue on ankle and knee joints and leg stiffness during a 30-scontinuous vertical jump test. Methods: Fifteen female volleyball players without h...
Introduction: The ability to attain high level of speed is an essential component of success in many sports fields. However, physical qualities that underpin this ability remain unclear. The purpose of this study was to investigate the role of leg stiffness and vertical stiffness in predicting sprint running. Methods: 50 healthy females were selected among physical education students. The requi...
Leg stiffness is a predictor of athletic performance and injury and typically evaluated during bilateral hopping. The contribution of each limb to bilateral leg stiffness, however, is not well understood. This study investigated leg stiffness during unilateral and bilateral hopping to address the following research questions: (1) does the magnitude and variability of leg stiffness differ betwee...
purpose: core stability and leg stiffness are two determinant mechanisms in athletic performance and risk injury. this study aimed to investigate the gender differences and relationship of these two factors in athletes. methods: in this cross-sectional study, core stability and leg stiffness of 12 male and 12 female iranian squash players at national level were examined utilizing mcgill’s test ...
Objective: Lower extremity stiffness is associated with variables such as the frequency and length of running steps, the amount of muscle force and power production. Previous studies showed contradictory findings regarding the relationship between lower extremities joints stiffness and start velocity. Sprint start can be highly affected by two key components of lower limb stiffness, namely, for...
Purpose: Core stability and leg stiffness are two determinant mechanisms in athletic performance and risk injury. This study aimed to investigate the gender differences and relationship of these two factors in athletes. Methods: In this cross-sectional study, core stability and leg stiffness of 12 male and 12 female Iranian squash players at national level were examined utilizing McGill’...
Stiffness is an index for determination of elastic properties of body and its optimum range is different in various motion patterns. The Spring-mass model is used for calculating stiffness. In this method, the whole leg is modeled with a linear simple spring. The aim of this study is determination of lower body stiffness and evaluation of its correlation with agility, as dominant motion patt...
When humans hop in place or run forward, leg stiffness is increased to offset reductions in surface stiffness, allowing the global kinematics and mechanics to remain the same on all surfaces. The purpose of the present study was to determine the mechanism for adjusting leg stiffness. Seven subjects hopped in place on surfaces of different stiffnesses (23-35,000 kN/m) while force platform, kinem...
Compliant walking models have been used to account for the gait dynamics associated with compliant lower limbs [1, 2], and leg compliance has been quantified as a form of vertical lower limb stiffness [3]. However, the vertical stiffness of the lower limb has been defined by the ratio of the force change to the displacement change based on a formulation of Kvert ≈ ΔF/Δx without considering a fu...
Both the linear leg spring model and the two-segment leg model with constant spring stiffness have been broadly used as template models to investigate bouncing gaits for legged robots with compliant legs. In addition to these two models, the other stiffness leg spring models developed using inspiration from biological characteristic have the potential to improve high-speed running capacity of s...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید