Effects of aerobic exercise training on sympathetic and renal responses to mental stress in humans
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Why the study?
Does aerobic exercise training reduce muscle sympathetic nerve activity and renal vasoconstriction during mental stress in healthy adults?
Population
23 healthy adults (11 men, 12 women), nonsmokers, nondiabetics, not taking any medications.
Comparison
8 weeks of aerobic exercise training. vs Sedentary control group.
Design
RCT, Subjects were randomly assigned to the exercise training group or…
Follow-up
8 weeks
Authors
Discussion
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Implication
Aerobic training fails to blunt MSNA or renal responses to mental stress despite fitness gains; challenges assumptions that VO2peak improvements reduce sympathetic reactivity.
Structured PICO
Does aerobic exercise training reduce muscle sympathetic nerve activity and renal vasoconstriction during mental stress in healthy adults?
P
Population
23 healthy adults (11 men, 12 women), nonsmokers, nondiabetics, not taking any medications.
I
Intervention
8 weeks of aerobic exercise training (running or stationary cycling 4 times/week, up to 60 min/day at 80% maximum heart rate, plus interval training).
C
Comparator
Sedentary control group.
O
Outcome
Muscle sympathetic nerve activity (MSNA) and renal vascular responses (renal blood flow velocity and renal vascular conductance) to mental stress.surrogate
Aerobic exercise training does not alter muscle sympathetic nerve activity or renal vascular responses to mental stress in healthy young adults, despite improving aerobic capacity.
Limitations
- Doppler ultrasound could not accurately measure renal artery diameter.
- The training period (8 weeks) and stressor (5 min of mental arithmetic) are relatively short in duration compared with stress experienced over a lifetime.
Cite This Study
Ray et al. (2009) studied this question.
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