Key result
Upright dynamic one-legged exercise significantly decreased muscle sympathetic nerve activity from 30 to 22 bursts/min (P<0.05), contrasting with known responses to arm exercise.
Why the study?
Does dynamic one-legged exercise affect muscle sympathetic nerve activity?
Population
Subjects undergoing dynamic one-legged knee extensions (n=10 for 20 W, n=9 for 30 W, n=9 for 40 W)
Comparison
Dynamic one-legged knee extensions at 20, 30… vs Resting control
Design
Other
Authors
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Suggests modality-specific sympathetic suppression; extends baroreflex physiology but leaves open clinical translation.
Does dynamic one-legged exercise affect muscle sympathetic nerve activity?
Absolute Event Rate: 22% vs 30%
p-value: p=<0.05
Dynamic one-legged exercise in the upright position suppresses muscle sympathetic nerve activity, likely due to increased cardiac filling pressures stimulating cardiopulmonary baroreceptors.
Ray et al. (1993) studied this question. Dynamic one-legged knee extensions (DLE) vs. Resting control / supine position was evaluated on Muscle sympathetic nerve activity (MSNA) (p=<0.05). Upright dynamic one-legged exercise significantly decreased muscle sympathetic nerve activity from 30 to 22 bursts/min (P<0.05), contrasting with known responses to arm exercise.
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