Effects of easy-to-use protein-rich energy bar on energy balance, physical activity and performance during 8 days of sustained physical exertion.
Tanskanen, M., Westerterp, K., Uusitalo, A., Atalay, M., Häkkinen, K., Kinnunen, H., & Kyröläinen, H. (2012). Effects of easy-to-use protein-rich energy bar on energy balance, physical activity and performance during 8 days of sustained physical exertion.. PLoS One, 7(10), e47771. https://doi.org/10.1371/journal.pone.0047771
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PLoS OneAuthors
Date
2012Discipline
LiikuntafysiologiaValmennus- ja testausoppiExercise PhysiologyScience of Sport Coaching and Fitness TestingCopyright
© 2012 Tanskanen et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License.
Background: Previous military studies have shown an energy deficit during a strenuous field training course (TC). This study
aimed to determine the effects of energy bar supplementation on energy balance, physical activity (PA), physical
performance and well-being and to evaluate ad libitum fluid intake during wintertime 8-day strenuous TC.
Methods: Twenty-six men (age 2061 yr.) were randomly divided into two groups: The control group (n = 12) had traditional
field rations and the experimental (Ebar) group (n = 14) field rations plus energy bars of 4.1 MJNday21
. Energy (EI) and water
intake was recorded. Fat-free mass and water loss were measured with deuterium dilution and elimination, respectively. The
energy expenditure was calculated using the intake/balance method and energy availability as (EI/estimated basal
metabolic rate). PA was monitored using an accelerometer. Physical performance was measured and questionnaires of
upper respiratory tract infections (URTI), hunger and mood state were recorded before, during and after TC.
Results: Ebar had a higher EI and energy availability than the controls. However, decreases in body mass and fat mass were
similar in both groups representing an energy deficit. No differences were observed between the groups in PA, water
balance, URTI symptoms and changes in physical performance and fat-free mass. Ebar felt less hunger after TC than the
controls and they had improved positive mood state during the latter part of TC while controls did not. Water deficit
associated to higher PA. Furthermore, URTI symptoms and negative mood state associated negatively with energy
availability and PA.
Conclusion: An easy-to-use protein-rich energy bars did not prevent energy deficit nor influence PA during an 8-day TC. The
high content of protein in the bars might have induced satiation decreasing energy intake from field rations. PA and energy
intake seems to be primarily affected by other factors than energy supplementation such as mood state.
...
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Public Library of ScienceISSN Search the Publication Forum
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Except where otherwise noted, this item's license is described as © 2012 Tanskanen et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License.
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