Changes in Body Composition, Energy Metabolites and Electrolytes During Winter Survival Training in Male Soldiers
Abstract
The aim of this study was to examine changes in body composition, energy metabolites and electrolytes during a 10-day winter survival training period. Two groups of male soldiers were examined: the REC group (n = 26; age 19.7 ± 1.2 years; BMI 23.9 ± 2.7) had recovery period between days 6 and 8 in the survival training, whereas the EXC group (n = 42; age 19.6 ± 0.8 years; BMI 23.1 ± 2.8) did not. The following data were collected: body composition (bioimpedance), energy balance (food diaries, heart rate variability measurements), and biomarkers (blood samples). In survival training, estimated energy balance was highly negative: −4,323 ± 1,515 kcal/d (EXC) and −4,635 ± 1,742 kcal/d (REC). Between days 1 and 10, body mass decreased by 3.9% (EXC) and 3.0% (REC). On day 6, free fatty acid and urea levels increased, whereas leptin, glucose and potassium decreased in all. Recovery period temporarily reversed some of the changes (body mass, leptin, free fatty acids, and urea) toward baseline levels. Survival training caused a severe energy deficit and reductions in body mass. The early stage of military survival training seems to alter energy, hormonal and fluid metabolism, but these effects disappear after an active recovery period.
Main Authors
Format
Articles
Research article
Published
2022
Series
Subjects
Publication in research information system
Publisher
Frontiers Media SA
Original source
https://www.frontiersin.org/articles/10.3389/fphys.2022.797268/full
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-202202241653Use this for linking
Review status
Peer reviewed
ISSN
1664-042X
DOI
https://doi.org/10.3389/fphys.2022.797268
Language
English
Published in
Frontiers in Physiology
Citation
- Nykänen, T., Ojanen, T., Heikkinen, R., Fogelholm, M., & Kyröläinen, H. (2022). Changes in Body Composition, Energy Metabolites and Electrolytes During Winter Survival Training in Male Soldiers. Frontiers in Physiology, 13, Article 797268. https://doi.org/10.3389/fphys.2022.797268
Copyright© 2022 Nykänen, Ojanen, Heikkinen, Fogelholm and Kyröläinen.