山地,公路骑自行车者和未经训练的对照者骨矿物质密度:运动,饮食和荷尔蒙
Francesco Zamboni1, Pietro Ferrari1, Lucia Cazzoletti1
1University of Verona.
Research quarterly for exercise and sport
|August 4, 2023
概括
与对照组相比,男性公路骑自行车者和山地骑自行车者表现出较低的腰椎骨矿物质密度 (BMD). 影响BMD的因素因测量地点和骑自行车学科而异.
科学领域:
- 运动医学 运动医学
- 骨生理学 骨生理学
- 运动科学 运动科学
背景情况:
- 骨矿物质密度 (BMD) 对于骨健康至关重要.
- 骑自行车,特别是公路自行车 (RC) 和山地自行车 (MC),对身体提出独特的要求.
- 了解骑自行车的BMD变异对于预防伤害和优化性能至关重要.
研究的目的:
- 为了比较腰椎 (LSBMD) 和大腿 (FBMD) 骨矿物质密度 (BMD) 在男性公路骑行者 (RC),山地骑行者 (MC) 和对照者 (C).
- 确定这些群体中与骨硬化相关的因素,包括能量可用性 (EA),运动能量支出 (EEE) 和VO2max.
主要方法:
- 双能X射线吸收计 (DXA) 用于测量BMD,脂肪质量 (FM) 和无脂肪质量 (FFM).
- 自我报告问卷评估了摄入量 (Cal),EEE和EA.
- 循环激素测试估计VO2max,并采集血液样本进行激素分析.
主要成果:
- 骑自行车的人 (RC和MC) 在调整体重后 (p < .001) 与对照组相比,显著降低了LSBMD.
- 在骑自行车者和对照者之间没有观察到FBMD的显著差异 (p = .213).
- 在对照组中发现了EA和LSBMD/FBMD之间的积极关联,在MC中发现了EA和FBMD. 在RC中观察到VO2max和LSBMD之间的负关系.
结论:
- 无论是RC和MC组都比对照组呈现较低的LSBMD,而自行车学科之间没有显著差异.
- 影响BMD的因素是复杂的,特定于地点,并且在骑自行车组和对照组之间有所不同.
- 能量可用性和最大的氧气吸收似乎是与骑自行车者的BMD相关的关键因素.
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