Biomechanical Determinants of the Reactive Strength Index During Drop Jumps
نویسندگان
چکیده
منابع مشابه
Contact Time, Jump Height, and Reactive Strength Index during Drop Jumps in Water, on Padded and Nonpadded Conditions
Twelve athletes, who routinely used plyometric exercises, performed drop jumps from 46 cm in water, on padded (5 cm thick wrestling mat), and unpadded conditions. GRF obtained via force platform and video analysis of markers placed along the leg were used to compare contact time (CT), flight time (FT), jump height calculated from flight time (JHFT) and video data (JHVIDEO), and reactive strengt...
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The basic drill of plyometric training aimed at improving lower limb power and jump height is a drop jump. This exercise can be performed using different techniques, which substantially affects jump variables. Therefore, the aim of this study was to compare the values of the reactive strength index (RSI) for countermovement drop jumps (CDJs) and bounce drop jumps (BDJs). The study was carried o...
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The reliability of the reactive strength index (RSI) and time to stabilization (TTS) during maximal-effort plyometric depth jumps was examined. Twenty-two subjects performed three depth jumps from a height of 30 cm. Measures such as height of jump (JH), ground-contact time (CT), RSI, and TTS were obtained and analyzed for reliability using Cronbach alpha reliability coefficient and intraclass c...
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Muscle- and movement-specific fascicle-tendon interaction affects the performance of the neuromuscular system. This interaction is unknown among elderly and consequently contributes to the lack of understanding the age-related problems on neuromuscular control. The present experiment studied the age specificity of fascicle-tendon interaction of the gastrocnemius medialis (GM) muscle in drop jum...
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Previously it was shown that spinal excitability during hopping and drop jumping is high in the initial phase of ground contact when the muscle is stretched but decreases toward takeoff. To further understand motor control of stretch-shortening cycle, this study aimed to compare modulation of spinal and corticospinal excitability at distinct phases following ground contact in drop jump. Motor-e...
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ژورنال
عنوان ژورنال: International Journal of Sports Physiology and Performance
سال: 2018
ISSN: 1555-0265,1555-0273
DOI: 10.1123/ijspp.2017-0021