Training alters joint power distributions during running in National Football League Draft Preparation Players.

IF 2 3区医学 Q3 ENGINEERING, BIOMEDICAL

Sports Biomechanics Pub Date : 2025-05-02 DOI:10.1080/14763141.2025.2498338

G Monique Mokha, Marissa Bonsangue, ToniAnn Brezina, Jacob Haberer

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引用次数: 0

Abstract

The aim of this study was to compare joint-specific contributions to total lower limb joint power during a speed run in American style football players before and after a 6-week National Football League (NFL) draft preparation camp. Fifty-two players performed one 5-second treadmill run at 5.5-6.5 m/s before and after camp. Speed was consistent between tests. Bilateral hip, knee, and ankle power generation (positive) and absorption (negative) were calculated from kinematics and kinetics using inverse dynamics. Negative total limb power decreased for both limbs, significantly for the left (Z = -2.113, p = .035, r = .30) due to significant decreases in negative ankle power bilaterally (left, Z = -1.967, p = .049, r = .27; right, Z = -2.623, p = .009, r = .36). The contribution of negative left hip power significantly increased (Z = -2.398, p = .016, r = .31). While no other significant changes in positive or negative joint-specific magnitudes or contributions occurred, there were general distal-to-proximal shifts in joint power contributions. Players appear to have adopted more energy efficient running through moderate joint-specific mechanistic training adaptations such as a reduction in ankle power absorption.

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训练改变了国家橄榄球联盟选秀准备球员跑步时的联合力量分配。

本研究的目的是比较美式橄榄球运动员在参加为期6周的国家橄榄球联盟（NFL）选秀准备训练营之前和之后进行速度跑时，关节对下肢总关节力量的特定贡献。52名运动员在训练营前后分别以5.5-6.5米/秒的速度在跑步机上跑了5秒。测试之间的速度是一致的。利用逆动力学从运动学和动力学计算双侧髋关节、膝关节和踝关节产生（正）和吸收（负）的能量。四肢负总肢力下降，左侧显著(Z = -2.113, p =。035, r = 0.30)，这是由于双侧踝关节负功率显著降低(左，Z = -1.967, p =。049, r = 0.27；对，Z = -2.623, p =。009, r = 0.36)。左髋关节负动力的贡献显著增加(Z = -2.398, p =。016, r = .31)。虽然没有发生其他显著的正或负关节特定幅度或贡献的变化，但在关节力量贡献方面存在从远端到近端的普遍变化。球员似乎通过适度的关节特定的机械训练适应，如减少脚踝的能量吸收，采用了更节能的跑步方式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

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.