Influence of Amputation on Kinetic Chain Musculature Activity During Basic and Modified Core Exercises.

IF 3.5 2区 医学 Q1 PHYSIOLOGY
Kaiqi Liu, Linhong Ji, Yijia Lu
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引用次数: 0

Abstract

Purpose: Core strength is vital for athletic performance, and many more exercises that involve the kinetic chain have been designed for able-bodied athletes. Disabilities that impair the kinetic chain can reduce the effectiveness of strength training. However, the impact of amputation on core strength training of people with disabilities and its underlying mechanism remains unclear. This study aimed to evaluate the muscle activation patterns and levels in athletes with amputation during 4 basic and modified weight-bearing core strength-training exercises.

Methods: Fifteen elite athletes with unilateral amputation (170.6 [7.3] cm; 63.9 [11.9] kg; 25.9 [5.3] y) volunteered for this study. Surface electromyography was used to measure the muscle activity mainly in the lumbopelvic-hip complex-stabilizing muscles during 4 kinetic chain trunk exercises with and without modifications.

Results: The significance level was set at α = .05. The results showed a significant difference in muscle activation between different body sides (P < .05). Specifically, amputation on the support position resulted in a diagonal pattern of muscle activation, and amputation on the free distal segments resulted in a unilateral dominant pattern with higher activation in muscles on the nonamputated side (P < .05). Modifications led to significant decreases in muscle activation asymmetry index (P < .05).

Conclusions: Amputation caused muscle activation asymmetry and 2 activation patterns. Modifications by enhancing proximal stability and adjusting distal loading effectively reduced the asymmetry of muscle activation. Coaches and clinicians can use these results to tailor exercises for athletes with disabilities in training and rehabilitation.

截肢对基本和改良核心运动中运动链肌肉活动的影响
目的:核心力量对运动表现至关重要,而更多涉及运动链的练习是为健全运动员设计的。损伤运动链的残疾会降低力量训练的效果。然而,截肢对残疾人核心力量训练的影响及其内在机制仍不清楚。本研究旨在评估截肢运动员在进行 4 种基本和改良负重核心力量训练时的肌肉激活模式和水平:方法:15 名单侧截肢的精英运动员(身高 170.6 [7.3] 厘米;体重 63.9 [11.9] 公斤;年龄 25.9 [5.3] 岁)自愿参加本研究。研究使用表面肌电图测量了 4 种运动链躯干练习时腰椎-髋关节复合稳定肌的肌肉活动:显著性水平设定为 α = .05。结果显示,不同体侧的肌肉激活情况存在明显差异(P < .05)。具体来说,支撑体位截肢导致肌肉激活呈对角线模式,而自由远端截肢导致单侧主导模式,非截肢侧肌肉激活程度较高(P < .05)。这些改变导致肌肉激活不对称指数明显下降(P < .05):结论:截肢导致肌肉激活不对称和两种激活模式。通过增强近端稳定性和调整远端负荷的方法有效减少了肌肉激活的不对称性。教练和临床医生可以利用这些结果,为残疾运动员的训练和康复量身定制练习。
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来源期刊
CiteScore
5.80
自引率
12.10%
发文量
199
审稿时长
6-12 weeks
期刊介绍: The International Journal of Sports Physiology and Performance (IJSPP) focuses on sport physiology and performance and is dedicated to advancing the knowledge of sport and exercise physiologists, sport-performance researchers, and other sport scientists. The journal publishes authoritative peer-reviewed research in sport physiology and related disciplines, with an emphasis on work having direct practical applications in enhancing sport performance in sport physiology and related disciplines. IJSPP publishes 10 issues per year: January, February, March, April, May, July, August, September, October, and November.
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