November 1, 1989Journal of Applied Physiology
Influence of muscle mass on sympathetic neural activation during isometric exercise
Why the study?
Does the size of the contracting muscle mass influence sympathetic neural activation during isometric exercise in healthy subjects?
Population
9 healthy subjects (aged 19-27 yr)
Comparison
2.5 min of isometric handgrip exercise performed… vs 2.5 min of isometric handgrip exercise performed…
Design
Other, random order
Authors
Discussion
Loading...
Member takes
Implication
Muscle mass size may modulate sympathetic activation during isometric exercise; hypothesis-generating for clinical populations or dynamic exercise.
Structured PICO
Does the size of the contracting muscle mass influence sympathetic neural activation during isometric exercise in healthy subjects?
P
Population
9 healthy subjects (aged 19-27 yr)
I
Intervention
2.5 min of isometric handgrip exercise (30% of maximal voluntary force) performed with both arms simultaneously
C
Comparator
2.5 min of isometric handgrip exercise performed with the right and left arms separately, and resting control
O
Outcome
Heart rate, systolic arterial blood pressure, and muscle sympathetic nerve activity in the leg (MSNA; peroneal nerve)surrogate
Sympathetic neural activation during isometric exercise is determined in part by the size of the active muscle mass, with responses from separate limbs exhibiting an inhibitory interaction rather than being simply additive.
Cite This Study
Douglas R. Seals (1989) studied this question.