在60天的卧床休息中,在人工重力下 (BRACE) 进行运动,调节液体荷尔蒙和血体积
Carol G Bryans1,2, Carmelo J Mastrandrea1,2, Eric T Hedge1,2
1Schlegel-University of Waterloo Research Institute for Aging, Waterloo, Canada.
Journal of applied physiology (Bethesda, Md. : 1985)
|January 30, 2026
概括
人工重力 (AG) 与运动相结合并没有防止头向床休息 (HDBR) 期间的血体积 (PV) 损失. 在健康的男性中,对策未能维持PV或抑制液体调节激素的释放.
科学领域:
- 空间生理学空间生理学
- 调节心血管系统的调节
- 人工引力研究的人工引力研究
背景情况:
- 太空飞行和卧床休息 (HDBR) 导致血体积 (PV) 减少,触发诸如宁和阿尔多斯特之类的液体保留激素.
- 人工重力 (AG) 和运动是潜在的对策,但在HDBR期间减轻光伏损失的最佳方案尚未建立.
研究的目的:
- 调查同时运动和AG对HDBR期间体积调节激素和PV的影响.
- 为了比较单独运动的疗效与联合运动和AG与静止控制对保持PV和荷尔蒙平衡的疗效.
主要方法:
- 24名健康的男性接受了60天的6° HDBR,分为静止控制,运动和运动+AG组.
- 运动包括每天30分钟的卧卧循环;运动+AG包括在短臂离心过程中进行这种运动.
- 评估了血体积,血液体积,血红蛋白质量,液体调节激素和红蛋白质.
主要成果:
- 在所有组中,HDBR显著降低了PV,血液体积和血红蛋白质量.
- 减少的PV与增加的活性宁相反相关.
- 在所有组中,红素水平在HDBR第3天下降;运动+AG在PV或荷尔蒙反应方面与运动或对照组没有区别.
结论:
- 同时炼和AG在HDBR期间未能保持血体积或突流体调节激素释放.
- 这些发现表明,AG不应仅在进行光伏保护时使用.
- 该研究强调需要进一步研究优化太空飞行对策的AG和炼协议.
相关概念视频
Hormonal Regulation
48.1K
Hormones regulate a significant portion of digestion through activation of the neuroendocrine system. The neuroendocrine system of digestion contains many different hormones all with multiple functions that are both, directly and indirectly, involved in digestion.
48.1K
Hormonal Regulation
36.1K
The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
36.1K
Pressure Variation in a Fluid at Rest
811
In a fluid at rest, the pressure at any point beneath the fluid surface depends solely on the depth, not on the container's shape or size. This principle, known as hydrostatic pressure, arises because, in stationary fluids, there is no acceleration, meaning the forces within the fluid balance out. Only vertical forces, caused by the weight of the fluid above, contribute to pressure changes with depth.
When measuring pressure at two different levels within the fluid, the difference in...
When measuring pressure at two different levels within the fluid, the difference in...
811
Types of Hormones
83.5K
Hormones can be classified into three main types based on their chemical structures: steroids, peptides, and amines. Their actions are mediated by the specific receptors they bind to on target cells.
83.5K
Regulation of Hormone Secretion
6.8K
Regulation of hormone secretion is a finely tuned orchestration driven by various types of stimuli, encompassing neural, humoral, and hormonal signals. Environmental cues instigate neural stimuli, where action potentials traverse nerve fibers to reach their designated targets. An illustrative scenario is the body's response to stress, wherein the sympathetic nervous system releases epinephrine from the adrenal glands, inducing the well-known 'fight or flight' reaction.
Humoral...
Humoral...
6.8K
Regulation of Stroke Volume
5.2K
The regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
5.2K


