Anabolic Adaptations Occur in Conscripts During Basic Military Training Despite High Prevalence of Vitamin D Deficiency and Decrease in Iron Status
| Autor: | Vahur Ööpik, Leho Rips, Helena Gapeyeva, Hanno Mölder, Saima Timpmann, Indrek Olveti, Hele-Reet Lille, Martin Mooses, Ahti Varblane, Kersti Kõiv |
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| Rok vydání: | 2017 |
| Předmět: |
Estonia
Male Gerontology medicine.medical_specialty Adolescent Hydrocortisone Iron Military service Physical fitness 030209 endocrinology & metabolism Body Mass Index Education Military medicine Hemoglobins Young Adult 03 medical and health sciences Anabolic Agents 0302 clinical medicine Prevalence Humans Medicine Testosterone Longitudinal Studies Analysis of Variance Research ethics business.industry Public health Public Health Environmental and Occupational Health 030229 sport sciences General Medicine Vitamin D Deficiency Military Personnel Hematocrit Physical Fitness Erythrocyte Count business Body mass index Declaration of Helsinki |
| Zdroj: | Military Medicine. 182:e1810-e1818 |
| ISSN: | 1930-613X 0026-4075 |
| DOI: | 10.7205/milmed-d-16-00113 |
| Popis: | In Estonian Defense Forces that are drawn up on the basis of the conscription model considerable numbers of young men are prematurely discharged from military service for medical reasons, but causes leading to premature dropout of conscripts have not been systematically studied. However, one of the factors involved could be relatively demanding physical training that starts at the beginning of military service in the form of basic military training (BMT). Cumulative training and nontraining stresses experienced by conscripts during BMT may exceed their physiological adaptability and increase the probability of becoming prematurely discharged. Therefore, the primary purpose of this study was to assess physiological responses to 10-week BMT in Estonian conscripts.The protocol of the study confirmed to the standards set by the Declaration of Helsinki and it was approved by the Research Ethics Committee of the University of Tartu. Mean ± SD age and body mass index of 94 conscripts studied was 20.9 ± 1.7 years and 24.2 ± 3.0 kg · mSignificant increases in serum testosterone concentration (60.6%), testosterone to cortisol ratio (61.1%), blood erythrocyte count (4.3%), hemoglobin concentration (3.8%) and hematocrit (2.2%), and decrease in serum ferritin concentration (39.3%) occurred between weeks 1 and 10 during BMT (in all cases p0.0001). Fifteen weeks later, these parameters were still at increased or decreased levels, respectively, compared to week 1. The prevalence of vitamin D deficiency (serum 25(OH) D concentration50 nmol · LThese findings suggest that BMT induces anabolic physiological adaptations in conscripts despite vitamin D deficiency and decrease in iron status. However, high prevalence of vitamin D deficiency and decline in iron status may limit physiological adaptations and improvement in physical work capacity to a suboptimal level. Furthermore, as vitamin D influences a variety of functions important for health, deficiency in conscripts should be considered a major concern that needs treatment. An acknowledged limitation of the study is the lack of a control group of conscripts possessing normal vitamin D status and stable serum ferritin levels throughout the study period. Nevertheless, the research design employed enabled to determine two factors that potentially limit physiological adaptability of conscripts to military training loads in ecologically authentic environment. |
| Databáze: | OpenAIRE |
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