身体构成对心脏康复后的最大氧气摄入量的影响
medRxiv : the preprint server for health sciences
|September 5, 2025
概括
心脏康复显著增加肌肉质量和氧气吸收峰值 (VO2峰值). 报告VO2峰值变化相对于体重显示出更大的改善,突出显示测量方法对患者结果的影响.
科学领域:
- 心脏病学
- 运动生理学
- 身体组成分析
背景情况:
- 氧气吸收峰值 (VO2峰值) 是心血管疾病 (CVD) 发病率和死亡率的关键预测因素.
- 一些接受心脏康复 (CR) 的心脏病患者尽管有其他功能上的改善,但VO2峰值没有改善,甚至有所降低.
- 身体组成,特别是瘦身量,可能会影响CR期间的VO2峰值变化.
研究的目的:
- 评估CR对瘦身质量的影响.
- 为了比较身体组成变化与总体质量对CR后VO2峰值的影响.
- 调查报告方法对VO2峰值改善的影响.
主要方法:
- 一项涉及140名成年CR患者的前后干预研究 (2015 - 2022年).
- 使用双能量X射线吸收测量 (DXA) 和心肺运动测试 (CPET) 来测量身体组成和CR前后的VO2峰值.
- 统计分析包括描述性统计,配对t测试和多变量线性回归.
主要成果:
- 导致总体质量显著下降 (-1. 28 公斤),瘦肉量显著增加 (+ 0. 84 公斤).
- 所有测量单位都显示VO2峰值增加:绝对 (+6. 52mL/ min),相对于总质量 (+8. 24mL/ kg/ min) 和相对于瘦肉质量 (+5. 73mL/ kg/ min).
- 在调整CR前VO2峰值后,多变量回归证实了所有单位VO2峰值百分比变化的统计意义.
结论:
- 在心脏病患者中,心脏康复可显著提高肌肉质量和VO2峰值.
- 当对总体体重进行调整时,VO2峰值的改善似乎更大,这表明报告方法对观察到的结果产生了影响.
- 进一步的研究可能会探索更长的CR持续时间或有针对性的干预措施,以优化VO2峰值的改善,特别是在患有持续异常或女性性别等特定预测因子的患者中.
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