Joint kinetic demand for performance in high jump.

IF 2 3区 医学 Q3 ENGINEERING, BIOMEDICAL
Toshihide Fujimori, Naoto Tobe, Natsuki Sado
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引用次数: 0

Abstract

High jump is a power-demanding motor task. Jumpers extend the take-off leg joints with maximum effort, but kinetic requirements (i.e. torque/power) for each joint are unclear. Here we show the inter-joint differences in the kinetic exertion related to the flight height in high jump trials by 16 male high jumpers (personal best record: 1.90-2.35 m). For the knee joint, both maximum net power and maximum norm of torque were significantly and positively correlated with flight height, with a stronger correlation for maximum net power (r = 0.70) than for maximum norm of torque (r = 0.52). For the hip joint, maximum norm of torque was significantly correlated with flight height (r = 0.62), but maximum net power (r = 0.36) was not. Both torque and power exhibited the proximal-to-distal sequence (from hip to ankle). The norm of ground reaction force peaked almost simultaneously with the hip torque while external net power peaked with knee power. We suggest that the required musculoskeletal function of each joint differs even in the same task. We suggest that it may be effective to adapt the different training programme between joints to improve performance. Jumpers should prioritise torque exertion for the hip and power exertion for the knee.

跳高成绩对关节动能的要求。
跳高是一项对力量要求很高的运动任务。跳高运动员以最大努力伸展起跳腿关节,但对每个关节的动能要求(即扭矩/力量)并不清楚。在这里,我们展示了 16 名男性跳高运动员(个人最好成绩:1.90-2.35 米)在跳高试验中与飞行高度相关的关节间动能消耗差异。就膝关节而言,最大净功率和最大扭矩标准值均与飞行高度呈显著正相关,其中最大净功率(r = 0.70)比最大扭矩标准值(r = 0.52)的相关性更强。就髋关节而言,最大扭矩标准值与飞行高度(r = 0.62)显著相关,但最大净功率(r = 0.36)则不相关。扭矩和功率都表现出从近端到远端的顺序(从髋关节到踝关节)。地面反作用力的标准值几乎与髋关节扭矩同时达到峰值,而外部净功率则与膝关节功率同时达到峰值。我们认为,即使在相同的任务中,每个关节所需的肌肉骨骼功能也是不同的。我们认为,调整不同关节之间的训练计划对提高成绩可能有效。跳远运动员应优先考虑髋关节的扭矩消耗和膝关节的力量消耗。
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来源期刊
Sports Biomechanics
Sports Biomechanics 医学-工程:生物医学
CiteScore
5.70
自引率
9.10%
发文量
135
审稿时长
>12 weeks
期刊介绍: Sports Biomechanics is the Thomson Reuters listed scientific journal of the International Society of Biomechanics in Sports (ISBS). The journal sets out to generate knowledge to improve human performance and reduce the incidence of injury, and to communicate this knowledge to scientists, coaches, clinicians, teachers, and participants. The target performance realms include not only the conventional areas of sports and exercise, but also fundamental motor skills and other highly specialized human movements such as dance (both sport and artistic). Sports Biomechanics is unique in its emphasis on a broad biomechanical spectrum of human performance including, but not limited to, technique, skill acquisition, training, strength and conditioning, exercise, coaching, teaching, equipment, modeling and simulation, measurement, and injury prevention and rehabilitation. As well as maintaining scientific rigour, there is a strong editorial emphasis on ''reader friendliness''. By emphasising the practical implications and applications of research, the journal seeks to benefit practitioners directly. Sports Biomechanics publishes papers in four sections: Original Research, Reviews, Teaching, and Methods and Theoretical Perspectives.
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