Key result
A 1-month Ranger training course significantly increased supine resting heart rate variability total power from 5,515.7 to 13,018.9 ms2 (p < 0.001), suggesting increased parasympathetic activity.
Why the study?
Does prolonged physical and psychological stress during a Ranger training course alter resting heart rate variability and testosterone levels in military cadets?
Population
23 cadets of the French military academy
Comparison
1-month Ranger training course concluded by a… vs Baseline (before the course)
Design
Cohort
Follow-up
1 month
Authors
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May indicate parasympathetic adaptation after intense training; leaves open clinical utility for fatigue monitoring in broader cohorts.
Observational (n=23)
No
Does prolonged physical and psychological stress during a Ranger training course alter resting heart rate variability and testosterone levels in military cadets?
Absolute Event Rate: 13018.9% vs 5515.7%
p-value: p=< 0.001
Prolonged physical and psychological stress during military training increases parasympathetic nervous system activity and decreases testosterone levels, indicating high fatigue.
Jouanin et al. (2004) conducted an observational in Healthy cadets undergoing physical and psychological stress (n=23). 1-month Ranger training course vs. Baseline (before the course) was evaluated on Total power (TP) of the HRV spectrum in a supine position (p=< 0.001). A 1-month Ranger training course significantly increased supine resting heart rate variability total power from 5,515.7 to 13,018.9 ms2 (p < 0.001), suggesting increased parasympathetic activity.
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