Journal of Defense Studies and Resource Management ISSN: 2324-9315

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Research Article, J Def Stud Resour Manage Vol: 2 Issue: 1

Heart Rate Variability Recordings are a Valid Non- Invasive Tool for Evaluating Soldiers’ Stress

Mika Salonen1,2, Juha Kokko1,3, Jarno Tyyskä1,4, Mikko Koivu1 and Heikki Kyröläinen1,5*
1Department of Leadership and Military Pedagogy, National Defence University, PL7, 00861 Helsinki, Finland
2Reserve Officer School, Kadettikoulunkatu 6, 49400 Hamina, Finland
3Kaarti Jaeger Brigade, PL 6, 00861 Helsinki, Finland
4Karelian Brigade, Varuskuntatie 230, 46141 Vekaranjärvi, Finland
5Department of Biology of Physical Activity, 40014 University of Jyväskylä, Finland
Corresponding author : Heikki Kyröläinen
Department of Biology of Physical Activity, 40014 University of Jyväskylä, Finland
E-mail: [email protected]
Received: February 07, 2013 Accepted: February 21, 2013 Published: February 27, 2013
Citation: Salonen M, Kokko J, Tyyskä J, Koivu M, Kyröläinen H (2013) Heart Rate Variability Recordings are a Valid Non-Invasive Tool for Evaluating Soldiers’ Stress. J Def Stud Resour Manage 2:1. doi:10.4172/2324-9315.1000107

Abstract

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)

Keywords: Hormone; Physiological stress; Military field training; Stress

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