根据最大心率或呼吸门规定的运动对脂肪氧化的反应没有性别差异
Todd A Astorino1, Alex J MacDonald2, Alex Anderson2
1Department of Kinesiology, California State University-San Marcos, 333. S. Twin Oaks Valley Road, UNIV 320, San Marcos, CA, 92096-0001, USA. astorino@csusm.edu.
European journal of applied physiology
|October 8, 2025
概括
这项研究没有发现运动期间脂肪氧化 (FOx) 的性别差异,当使用呼吸门 (VT) 或%最大心率 (%HRmax) 匹配强度时. 这些发现挑战了以前关于身体活动期间基于性别的代谢反应的假设.
科学领域:
- 运动生理学 运动生理学
- 人类的新陈代谢.
- 运动科学 运动科学 运动科学
背景情况:
- 以前的研究表明,女性在运动期间的脂肪氧化 (FOx) 比男性高.
- 运动处方通常使用百分比最大心率 (%HRmax) 或氧气吸收 (%VO2max),这可能不准确地反映不同性别的代谢强度.
研究的目的:
- 为了研究运动期间基质代谢 (脂肪氧化和碳水化合物氧化) 的性别差异.
- 为了比较运动强度时的代谢反应,使用%HRmax和呼吸门 (VT) 进行比较,旨在匹配代谢应变.
主要方法:
- 活跃的男性 (n=24) 和女性 (n=25) 完成了增量循环测试,以确定最大氧气吸收 (VO2max),最大心率 (HRmax),峰值功率输出 (PPO) 和VT.
- 然后,参与者进行了35分钟的骑自行车比赛,HRmax为62%,VT低于30%,在过夜禁食后.
主要成果:
- 在62%HRmax时,男性和女性之间没有观察到呼吸交换比率 (RER) 或FOx的显著差异,尽管男性的碳水化合物氧化率 (CHOOx) 较高.
- 在VT以下的30%时,无论是RER,FOx还是CHOOx都没有性别差异.
- 工作负载在62%HRmax时,男性 (31%PPO) 与女性 (24%PPO) 相比,工作负载在30%以下的VT是相似的 (46%PPO对44%PPO).
结论:
- 当使用呼吸门 (VT) 或%HRmax标准化运动强度时,脂肪氧化 (FOx) 的性别差异并不明显.
- 这些发现表明,基于VT或%HRmax的运动处方方法可能会使代谢应变正常化,从而导致男性和女性之间类似的基质利用模式.
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