Key result
Isometric handgrip and leg extension increased skin sympathetic nerve activity in an intensity-dependent manner during the first 30 seconds (up to 92% and 76% increase), but not at fatigue.
Why the study?
Does exercise intensity, fatigue level, or muscle mass affect the magnitude of exercise-induced increase in skin sympathetic nerve activity during isometric exercise?
Population
12 subjects in protocol 1 and 8 subjects in protocol 2
Comparison
Isometric handgrip and isometric leg extension… vs Baseline, different exercise intensities…
Design
Other, randomly performed IHG and IKE bouts
Authors
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SSNA responses to isometric exercise appear muscle-group independent at moderate intensity; leaves open effects of intensity and fatigue.
RCT (n=20)
Randomized
Does exercise intensity, fatigue level, or muscle mass affect the magnitude of exercise-induced increase in skin sympathetic nerve activity during isometric exercise?
Exercise-induced increases in skin sympathetic nerve activity are intensity-dependent initially, but this dependence is eliminated with the development of fatigue, regardless of muscle mass or limb.
Wilson et al. (2005) reported an RCT. Isometric handgrip and leg extension vs. Baseline was evaluated on Change in skin sympathetic nerve activity (SSNA) from baseline. Isometric handgrip and leg extension increased skin sympathetic nerve activity in an intensity-dependent manner during the first 30 seconds (up to 92% and 76% increase), but not at fatigue.
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