在一个包括老年人和年轻成年人在内的小组中,耐力训练增加了VO2max的生理决定因素
Robin Faricier, Donald H Paterson1, Juan M Murias2
1School of Kinesiology, the University of Western Ontario, London, CANADA.
Medicine and science in sports and exercise
|April 2, 2025
概括
强烈的耐力运动通过改善心脏输出和肌肉血管化,显著提高成人最大氧气吸收 (V ̇O2max). 这些生理适应增强氧气的运输和利用,改善心肺呼吸能力.
科学领域:
- 运动生理学 运动生理学
- 心血管健康 呼吸系统健康
- 老龄化与运动
背景情况:
- 最大氧吸收量 (V·O2max) 是心肺健康的一个关键指标.
- 了解耐力训练的生理适应对于优化运动处方至关重要,特别是在老年人中.
- 之前的研究已经确定了促进VO2max改善的中央和外围因素,但不同年龄组的相互作用需要进一步调查.
研究的目的:
- 为了研究中心和外围的生理适应,导致12周强烈的耐力炼计划后最大氧气吸收 (V̇O2max) 的增加.
- 为了比较健康的老年人和年轻人之间的这些适应.
主要方法:
- 14名健康的成年人 (7名老年人,7名年轻人) 参加了为期12周的骑自行车计划 (每周3次,每周45分钟在~70%V̇O2max).
- 训练前和训练后的评估包括VO2max,心脏功能 (例如心脏输出,中风体积),肌肉毛细化和线粒体含量 (例如酸盐合成酶活性).
主要成果:
- 所有参与者在训练后都观察到VO2max (20%) 的显著增加.
- 改善与最大心力输出增强 (15%),中风体积 (14%),毛细血管密度 (22%) 和酸盐合成酶活性 (144%) 相关.
- 在V̇O2max的变化与心脏输出,中风量,毛细血管密度和酸盐合成酶活性正相关.
结论:
- 心血管健康的增长是由中央 (心脏功能) 和外围 (血管化,线粒体活动) 适应的结合驱动的.
- 耐力训练有效地增强了年轻人和老年人的氧气运输系统和细胞内有氧能力.
- 这些发现强调了心脏输出和肌肉水平适应对于改善V·O2max的重要性.
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