Key result
Physical stimuli increased plasma norepinephrine and epinephrine across all conditions, whereas dopamine-beta-hydroxylase activity increased only during supramaximal dynamic exercise.
Why the study?
Does sympathetic stimulation via different exercise intensities differentially affect plasma DBH activity compared to norepinephrine and epinephrine concentrations?
Population
7 human subjects
Comparison
Sympathetic stimulation via hand-grip, standing… vs Rest
Design
Other
Authors
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May favor catecholamines over DBH as sympathetic indices during exercise; hypothesis-generating and should not yet change practice.
Observational (n=7)
Does sympathetic stimulation via different exercise intensities differentially affect plasma DBH activity compared to norepinephrine and epinephrine concentrations?
Plasma norepinephrine and epinephrine concentrations are more accurate and sensitive indices of sympathetic activity than dopamine-beta-hydroxylase activity across varying stimulus intensities.
Péronnet et al. (1985) reported an observational. Physical stimuli (hand-grip, standing, supra-maximal bicycle exercise) vs. Rest was evaluated on Plasma DBH activity, NE, and E concentrations. Physical stimuli increased plasma norepinephrine and epinephrine across all conditions, whereas dopamine-beta-hydroxylase activity increased only during supramaximal dynamic exercise.
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