Key result
A 72-hour military field training significantly reduced serum total testosterone in healthy male soldiers from 19.0 to 12.6 nmol/l (p<0.001).
Why the study?
Does heart rate variability serve as a valid non-invasive stress indicator during a 72-hour military field training in healthy male soldiers?
Observational (n=10)
Does heart rate variability serve as a valid non-invasive stress indicator during a 72-hour military field training in healthy male soldiers?
A 72-hour military field training induces significant physiological stress, evidenced by a marked reduction in serum total testosterone.
Testosterone suppression signals acute stress in prolonged training; leaves open HRV validity as non-invasive marker in soldiers.
Heart Rate Variability Recordings are a Valid Non- Invasive Tool for Evaluating Soldiers’ Stress The purpose of the present study was to investigate physiological responses and to evaluate heart rate variability as a non-invasive stress indicator during a 72-hour military field training (MFT). Ten healthy male soldiers (age 20 ± 1 yr.) participated in MFT. They slept approximately 2 h/day and ate only army field rations. During MFT, the soldiers’ mean (±SD) energy expenditure was 4646 ± 674, energy intake 2200 ± 326, and energy deficit (ED) 2405 ± 890 kcal⋅day-1.Throughout the entire training period, serum total testosterone (TES) reduced from 19.0 ± 3.0 to 12.6 ± 6.2 nmol⋅l-1 (p<0.001)
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Salonen et al. (2013) conducted an observational in Healthy (n=10). 72-hour military field training (MFT) vs. Baseline was evaluated on Serum total testosterone (TES) (p=<0.001). A 72-hour military field training significantly reduced serum total testosterone in healthy male soldiers from 19.0 to 12.6 nmol/l (p<0.001).
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