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Haemodynamic responses to static and dynamic handgrip before and after autonomic blockade
Clinical Science (London, England : 1979)
|June 1, 1983
Summary
Static and dynamic handgrip exercise to fatigue elicit similar blood pressure increases. Autonomic blockade slightly reduced systolic pressure response but did not affect other measures, indicating minimal autonomic influence on this pressor response.
Area of Science:
- Exercise Physiology
- Cardiovascular Regulation
- Autonomic Nervous System
Background:
- Static and dynamic exercises are common forms of physical activity.
- The role of the autonomic nervous system in mediating cardiovascular responses to different exercise types is not fully understood.
Purpose of the Study:
- To compare the pressor responses to static and dynamic handgrip exercise to fatigue.
- To investigate the influence of autonomic blockade on these responses.
Main Methods:
- Six healthy men performed static and dynamic handgrip exercises to local muscular fatigue.
- Cardiovascular parameters (blood pressure, cardiac output, peripheral resistance) were measured.
- Autonomic blockade was achieved using atropine and metoprolol.
Main Results:
- Both static and dynamic handgrip produced similar increases in systolic, diastolic, and mean arterial pressures.
- Autonomic blockade attenuated the systolic arterial pressure response but not diastolic or mean pressure.
- Cardiac output increased significantly only during dynamic exercise, and this persisted after blockade.
Conclusions:
- Static and dynamic handgrip exercise to fatigue induce comparable pressor responses.
- The autonomic nervous system plays a minor role in the pressor response to handgrip exercise to fatigue.