Littell E H
Phys Ther. 1981 Sep;61(9):1260-4. doi: 10.1093/ptj/61.9.1260.
Exercise can be sustained only if there is increased blood flow to those tissues with increased metabolic needs. Blood flow to particular working muscles can be increased either by increasing cardiac output or by redirecting peripheral blood flow. The nature and extent of changes in cardiovascular function that occur during exercise are dependent on the type of exercise, the muscles involved, and the severity of the exercise stress. The normal range of changes in heart rate, stroke volume, and patterns of peripheral blood flow are discussed in relation to different types of exercise stress.
只有当流向代谢需求增加的组织的血流量增加时，运动才能持续。增加心输出量或重新分配外周血流，都可以增加流向特定工作肌肉的血流量。运动期间发生的心血管功能变化的性质和程度取决于运动类型、涉及的肌肉以及运动应激的严重程度。本文将讨论不同类型运动应激下心率、每搏输出量和外周血流模式的正常变化范围。
