Key result
Local heating of the forearm during ischemic dynamic handgrip significantly increased muscle sympathetic nerve activity compared to control, showing blood flow modulates temperature effects.
Why the study?
Does local muscle heating alter muscle sympathetic nerve activity during dynamic handgrip exercise?
Population
16 human subjects (8 in the first experiment, 8 in the second experiment)
Comparison
Local heating of the forearm during graded… vs Control conditions during the same exercise…
Design
Other
Authors
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Local heating effects on sympathetic activity during ischemic exercise warrant no practice change; leaves open temperature-blood flow modulation of muscle afferents.
Does local muscle heating alter muscle sympathetic nerve activity during dynamic handgrip exercise?
Muscle blood flow modulates the sensitizing effect of muscle temperature on skeletal muscle afferents and muscle sympathetic nerve activity during exercise.
Cook et al. (2009) studied this question. Local heating of the forearm vs. Control condition was evaluated on Muscle sympathetic nerve activity (MSNA) burst frequency and total activity. Local heating of the forearm during ischemic dynamic handgrip significantly increased muscle sympathetic nerve activity compared to control, showing blood flow modulates temperature effects.
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