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负载运动增加了健康的年轻女性的吸收和保留
Erin Gaffney-Stomberg1, Anna T Nakayama1, Laura J Lutz1
1Military Performance Division, U.S. Army Research Institute of Environmental Medicine, Natick, MA 01760, United States.
强烈的有氧运动通过改变的吸收和分泌,降低了电离 (iCa) 和提高了副甲状腺激素 (PTH). 这导致运动期间更积极的平衡.
科学领域:
- 运动生理学 运动生理学
- 矿物质的新陈代谢.
- 内分泌学 在内分泌学.
背景情况:
- 众所周知,有氧运动可以减少循环的电离 (iCa) 和增加副甲状腺激素 (PTH).
- 这些变化对处理的确切机制和后果尚不清楚.
研究的目的:
- 为了研究强度运动对动学的影响.
- 为了确定运动如何影响的吸收,沉积,再吸收和平衡,使用稳定的同位素.
主要方法:
- 一项随机交叉研究,涉及21名健康女性.
- 参与者经历了艰苦的运动 (60分钟在65%的VO2max和加重背心) 和休息的时期.
- 两个稳定的同位素 (42Ca和44Ca) 被静脉注射和口服,使用动力建模来评估处理参数.
主要成果:
- 运动在会议期间显著降低了iCa,增加了PTH.
- 与休息相比,运动期间的部分吸收 (FCA) 较高.
- 平衡 (Vbal) 在运动期间较少负面,表明保留改善,而骨沉积 (Vo+) 和再吸收 (Vo-) 保持不变.
结论:
- 运动期间循环iCa的减少可能源于可混合池的变化.
- 运动促使肠道吸收和处理的适应性变化.
- 这些适应有助于在艰苦的体力活动中保持更积极的平衡.
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