August 18, 2010Applied Physiology Nutrition and Metabolism
Sex differences in linear and nonlinear heart rate variability during early recovery from supramaximal exercise
Key result
Women demonstrated a significantly greater change in LF/HF ratio and short-term scaling exponent (α1) than men from rest to early recovery following supramaximal exercise.
Why the study?
Does supramaximal exercise elicit different cardiac autonomic responses in young women compared to young men?
Population
25 healthy individuals, aged 20 to 33 years (13 males and 12 females)
Comparison
30-s Wingate test (supramaximal exercise) vs Resting state and male participants
Design
Cross-sectional
Follow-up
5 min after exercise
Authors
Discussion
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Member takes
Implication
Sex differences in post-exercise autonomic recovery merit consideration; leaves open prospective outcome studies before clinical application.
Study Design
Type
Cross-Sectional (n=25)
Structured PICO
Does supramaximal exercise elicit different cardiac autonomic responses in young women compared to young men?
P
Population
25 individuals (13 males and 12 females) aged 20 to 33 years who performed a 30-s Wingate test to assess cardiac autonomic response.
E
Exposure
30-s Wingate test (supramaximal exercise)
C
Comparator
Resting state (before exercise) and male participants
O
Outcome
Linear (spectral analysis: LF, HF, LF/HF ratio) and nonlinear (detrended fluctuation analysis: α1) measures of heart rate variability (HRV) before and 5 min after exercisesurrogate
Main Result
p-value: p=<0.05
Young women exhibit a greater change in cardiac autonomic function during early recovery from supramaximal exercise compared to young men.
Cite This Study
Mendonça et al. (2010) conducted a cross-sectional in Healthy individuals (n=25). Female sex vs. Male sex was evaluated on Change in linear and nonlinear measures of heart rate variability (LF/HF ratio and α1) from rest to recovery (p=<0.05). Women demonstrated a significantly greater change in LF/HF ratio and short-term scaling exponent (α1) than men from rest to early recovery following supramaximal exercise.