Isometric Exercise: Cardiovascular Responses in Normal and Cardiac Populations

摘要: Isometric exercise produces a characteristic pressor increase in blood pressure which may be important maintaining perfusion of muscle during sustained contraction. This response is mediated by combined central and peripheral afferent input to medullary cardiovascular centers. In normal individuals the rise cardiac output with little or no change systemic vascular resistance. However, also maintained pharmacologic blockade surgical denervation increasing Left ventricular function normally improves subjects patients mild impairment left contractility. Patients poor show deterioration isometric exercise, although this pattern difficult predict from resting studies. Recent studies have shown that uncomplicated myocardial infarction can perform submaximum such as carrying weights range 30 50 lb without difficulty adverse responses. addition, many who ischemic ST depression angina dynamic reduced exercise. exercises are frequently encountered activities daily living occupational tasks. Cardiac should gradually exposed training supervised rehabilitation programs. Specific job tasks require evaluated work simulation approach facilitate wish return requiring frequent Finally, there need for additional research on long-term effects hypertrophy performance. The vigorous regimens currently utilized international class professional athletes stimulate longitudinal physiologic pathophysiologic outcomes intense