Static handgrip exercise increased the slope of the arterial baroreflex relationship by >300% (P<0.001) and the diastolic arterial pressure intercept by 13 mmHg (P<0.001).
p-value: p=<0.001
To examine effects of static exercise on the arterial baroreflex control of vascular sympathetic nerve activity, 22 healthy male volunteers performed 2 min of static handgrip exercise at 30% of maximal voluntary force, followed by postexercise circulatory arrest (PE-CA). Microneurographic recording of muscle sympathetic nerve activity (MSNA) was made with simultaneous recording of arterial pressure (Portapres). The relationship between MSNA and diastolic arterial pressure was calculated for each condition and was defined as the arterial baroreflex function. There was a close relationship between MSNA and diastolic arterial pressure in each subject at rest and during static exercise and PE-CA. The slope of the relationship significantly increased by >300% during static exercise (P < 0.001), and the x-axis intercept (diastolic arterial pressure level) increased by 13 mmHg during exercise (P < 0.001). These alterations in the baroreflex relationship were completely maintained during PE-CA. It is concluded that static handgrip exercise is associated with a resetting of the operating range and an increase in the reflex gain of the arterial barorelex control of MSNA.
Kamiya et al. (Mon,) conducted a other in Healthy (n=22). Static handgrip exercise vs. Rest was evaluated on Arterial baroreflex function (relationship between MSNA and diastolic arterial pressure) (p=<0.001). Static handgrip exercise increased the slope of the arterial baroreflex relationship by >300% (P<0.001) and the diastolic arterial pressure intercept by 13 mmHg (P<0.001).