運動に対する循環器の反応は健康に有益である
1Department of Physiology and Biophysics, Mayo Clinic/Mayo Foundation, Rochester, MN 55905.
運動は循環器の調整を誘発し,局所的な化学的変化と交感神経系の活性化を通じて,活発な筋肉への血流を増やす. これは心臓の機能を向上させ,血流を誘導し,運動中に血圧を維持します.
科学分野:
- 心血管生理学 心血管の生理学
- 運動生理学 運動生理学
背景:
- 筋肉の運動は,複雑な循環器や神経の適応を必要とする.
- 活発な筋肉の局所化学信号は血管拡張を促進し,代謝の需要を満たすために血流を増やす.
研究 の 目的:
- 筋肉の運動中の複雑な血動力学および神経の調整を明らかにする.
- 静的運動と動的運動の間の循環器の反応の違いを理解する.
主な方法:
- この研究では,運動中の循環器の変化の基礎となる生理学的メカニズムをレビューしています.
- 局所化学的要因,交感神経系の活性化,中央命令の役割を調べている.
主要な成果:
- 交感性活性化により,心拍数と収縮性が増加し,外周血管が収縮し,血圧が維持されます.
- 活発な筋肉は血管拡張により血流が増加し,非活発な領域は収縮します.
- 静的運動は動的運動よりも動脈の血圧を上昇させるが,これはより高い心電量と血管抵抗によるものである.
結論:
- 運動によって引き起こされる血液動力学的変化は,局所的要因,ニューラルアウトフロー,中央コマンドによって調整されます.
- これらの適応は,活発な筋肉に十分な酸素供給を確保し,心血管の安定性を維持します.
- 動脈の気圧受容体は,長時間運動中に高血圧に適応する.
さらに関連する動画
09:04Skeletal Muscle Neurovascular Coupling, Oxidative Capacity, and Microvascular Function with 'One Stop Shop' Near-infrared Spectroscopy
Published on: February 20, 2018
07:26Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans
Published on: October 17, 2018
関連する概念動画
Pathophysiology of Cardiac Performance
Exercise and Cardiac Output
Sustained exercise increases the muscles' oxygen demand, which can be met...
Exercise and Cardiovascular Response
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Cardiac Output I:Effect of Heart Rate on Cardiac Output
Cardiac output (CO) refers to the total amount of blood ejected by one of the ventricles in liters per minute (L/min). In a resting adult, CO ranges from 5 to 6 L/min, adjusting according to the body's metabolic requirements.
Effect of Heart Rate on Cardiac Output
Cardiac output adapts to metabolic demands during stress, physical activity, or illness. The autonomic nervous system regulates heart rate via the sinoatrial node. The parasympathetic nervous system decreases heart rate...
Regulation of the Cardiovascular System
The regulation of the cardiovascular system involves the autonomic nervous system (ANS), baroreceptors, and chemoreceptors, ensuring that heart rate and blood pressure are appropriately modulated in response to varying physiological demands.
The ANS comprises two main divisions: the sympathetic and parasympathetic nervous systems. The sympathetic nervous system enhances...
Exercise Stress Test
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
