Effects of Different Levels of Fatigue on Vertical Jump Performance, Vertical Stiffness, and Intralimb Coordination

IF 1.3 Q3 SPORT SCIENCES
D. Knihs, J. A. Dias, J. Pupo
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引用次数: 1

Abstract

This study aimed to investigate the acute effects of different levels of muscular fatigue on vertical jump perfor- mance, vertical stiffness, and intralimb coordination. Seventeen physically active men performed two fatigue protocols (low volume and high volume) composed of continuous vertical jumps on separate weeks. Jump height, vertical stiffness, and intralimb coordination were measured during countermovement vertical jumps prior to and immediately following the fatigue protocols. The jumps were performed on a force plate and filmed with high-speed cameras. The continuous relative phase was calculated as a measure of intralimb coordination. Mixed-model ANOVA was used to compare the variables between conditions and times. The fatigue index was greater in the high-volume protocol (27±12%) than in the low-volume protocol (16±7%). Jump height decreased (p≤0.01) after the high-volume protocol. Vertical stiffness decreased (p=0.05), and the continuous relative phase of thigh-shank coupling in the ascent phase of countermovement jumps increased (p=0.04) after both proto- cols. In conclusion, jump performance was only affected by higher fatigue indexes, while vertical stiffness and intralimb coordination were affected similarly irrespective of the fatigue levels.
不同程度的疲劳对垂直跳跃性能、垂直刚度和肢体内协调的影响
本研究旨在探讨不同程度的肌肉疲劳对垂直跳跃表现、垂直僵硬度和肢体协调的急性影响。17名身体活跃的男性在不同的周内进行了两种疲劳方案(低量和高量),由连续的垂直跳跃组成。在疲劳方案之前和之后的反向垂直跳跃过程中,测量了跳跃高度、垂直刚度和下肢协调性。跳伞是在一个测力板上进行的,并用高速摄像机拍摄下来。计算了连续相对相位作为边缘内配位的度量。采用混合模型方差分析比较条件和时间之间的变量。大容量方案的疲劳指数(27±12%)大于小容量方案(16±7%)。高容量方案后跳跃高度降低(p≤0.01)。两种方案均降低了垂直刚度(p=0.05),增加了反向跳跃上升阶段股骨-小腿耦合的连续相对相位(p=0.04)。综上所述,只有较高的疲劳指数才会影响跳跃性能,而无论疲劳程度如何,垂直刚度和肢内协调性都受到类似的影响。
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来源期刊
CiteScore
2.80
自引率
0.00%
发文量
14
审稿时长
9 weeks
期刊介绍: MJSSM covers all aspects of sports science and medicine; all clinical aspects of exercise, health, and sport; exercise physiology and biophysical investigation of sports performance; sport biomechanics; sports nutrition; rehabilitation, physiotherapy; sports psychology; sport pedagogy, sport history, sport philosophy, sport sociology, sport management; and all aspects of scientific support of the sports coaches from the natural, social and humanistic side.
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