肌肉结构和力量：老年人短期抗阻训练的适应。
Muscle architecture and strength: adaptations to short-term resistance training in older adults.
机构信息
Institute of Exercise Physiology and Wellness, University of Central Florida, 4000 Central Florida Boulevard, Orlando, Florida, 32816, USA.
出版信息
Muscle Nerve. 2014 Apr;49(4):584-92. doi: 10.1002/mus.23969. Epub 2014 Jan 27.
INTRODUCTION
Muscle morphology and architecture changes in response to 6 weeks of progressive resistance training were examined in healthy older adults.
METHODS
In this randomized, controlled design, muscle strength, quality, and architecture were evaluated with knee extension, DEXA, and ultrasound, respectively, in 25 older adults.
RESULTS
Resistance training resulted in significant increases in strength and muscle quality of 32% and 31%, respectively. Cross-sectional area of the vastus lateralis increased by 7.4% (p ≤ 0.05). Physiological cross-sectional area (PCSA) of the thigh, a composite measure of muscle architecture, was related significantly to strength (r = 0.57; p ≤ 0.01) and demonstrated a significant interaction after training (p ≤ 0.05). Change in PCSA of the vastus lateralis was associated with change in strength independent of any other measure.
CONCLUSIONS
Six weeks of resistance training was effective at increasing strength, muscle quality, and muscle morphology in older adult men and women.
简介
本研究旨在探讨 6 周渐进式抗阻训练对健康老年人肌肉形态和结构的影响。
方法
本随机对照设计研究共纳入 25 名老年人，分别采用膝关节伸展试验、DEXA 和超声评估肌肉力量、质量和结构。
结果
抗阻训练使力量和肌肉质量分别显著增加 32%和 31%。股外侧肌横截面积增加 7.4%（p ≤ 0.05）。大腿的生理横截面积（PCSA）作为肌肉结构的综合指标，与力量显著相关（r = 0.57；p ≤ 0.01），并且在训练后存在显著的交互作用（p ≤ 0.05）。股外侧肌 PCSA 的变化与力量的变化独立于任何其他指标相关。
结论
6 周的抗阻训练可以有效增加老年男性和女性的力量、肌肉质量和肌肉形态。
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