用身体活动取代久坐的时间:强度是否对老年人身体组成有影响?
Megan Hetherington-Rauth1, Katey Webber1, Lauren S Roe2
1California Pacific Medical Center Research Institute, San Francisco, CA, USA.
Journal of sports sciences
|May 2, 2024
概括
通过体育活动取代久坐的时间对老年男性有好处.
科学领域:
- 老年学和运动生理学
- 身体构成和身体活动
- 老龄化和健康结果.
背景情况:
- 久坐时间 (ST) 和体力活动 (PA) 水平对于保持老年人身体组成至关重要.
- 了解PA和ST不同强度之间的相互作用对于有针对性的健康干预至关重要.
- 最老的老年人群存在独特的生理挑战,这些挑战可能会影响行为和身体组成之间的关系.
研究的目的:
- 调查ST,光强度PA (LPA) 和中度至强度PA (MVPA) 与老年男性肌肉和脂肪质量的独立和联合关联.
- 探索如何用不同强度的PA替换ST,使用同时代替代模型影响身体组成.
- 为优化身体活动提供洞察力,建议在老年男性中保持肌肉质量和减少脂肪质量.
主要方法:
- 从MrOS队列研究中分析了1046名最年长的老人 (平均年龄84.0岁) 的数据.
- 使用加速度计对ST,LPA和MVPA的客观测量.
- 评估肌肉质量 (D3Cr) 和脂肪质量 (DXA) 的统计建模,包括同时代替代.
主要成果:
- 用MVPA替换30分钟的ST与显著较低的脂肪质量和边界显著更高的肌肉质量有关.
- 用LPA取代30分钟的ST与显着较低的脂肪质量相关,但对肌肉质量没有显著影响.
- 用任何强度的PA替换ST在这个队列中证明了脂肪质量减少的好处.
结论:
- 将静坐时间与体力活动,特别是MVPA交换,为减少脂肪质量和潜在地改善老年男性的肌肉质量提供了显著的好处.
- 这些发现表明,在老年人群中,促进PA而不是ST是改善身体组成和代谢健康的可行策略.
- 专注于增加MVPA的有针对性的干预措施可能比LPA更有效,在老年男性中同时管理脂肪质量和保持骨肌肉质量.
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