Hormonal response patterns are differentially influenced by physical conditioning programs during basic military training

Autor: Herbert Groeller, Simon D. Burley, Bradley C. Nindl, Jace R. Drain
Rok vydání: 2017
Předmět:
Adult
Male
Total physical activity
medicine.medical_specialty
Hydrocortisone
0211 other engineering and technologies
Receptors
Cell Surface
Physical Therapy
Sports Therapy and Rehabilitation
02 engineering and technology
Young Adult
03 medical and health sciences
0302 clinical medicine
Sex hormone-binding globulin
Humans
Medicine
Stress profile
Testosterone
Orthopedics and Sports Medicine
Prospective Studies
Insulin-Like Growth Factor I
Exercise physiology
021110 strategic
defence & security studies
Exercise Tolerance
biology
Physical conditioning
business.industry
Australia
030229 sport sciences
Regimen
Cross-Sectional Studies
Military Personnel
Physical Fitness
Case-Control Studies
Body Composition
biology.protein
Physical therapy
Female
business
Physical Conditioning
Human
Hormonal response
Zdroj: Journal of Science and Medicine in Sport. 20:S98-S103
ISSN: 1440-2440
DOI: 10.1016/j.jsams.2017.08.020
Popis: Compare traditional military physical training and more contemporary physical training on catabolic and anabolic hormones and body composition in recruits undertaking basic military training (BMT).A prospective cross-sectional study design.Two recruit intakes were assessed over the 12-week Australian Army BMT course. The control group (CON) comprised 40 recruits (26M/14F) and the experimental group (EXP) comprised 35 recruits (25M/10F). Hormone concentrations (IGF-I, testosterone, cortisol, SHBG) and body composition were assessed at weeks 1 and 12. The EXP group undertook a higher-load/intensity physical training regimen, while CON undertook the extant physical training program which focused on cardiovascular and muscular endurance. Total physical activity within physical training sessions was assessed during weeks 2, 6 and 9.There was a significant group×time interaction (p0.01) for IGF-I and cortisol, and main effects over time (p0.01) for IGF-I, cortisol and SHBG. There were main effects for time (p0.05) for lean and fat mass, and these changes were associated (p0.05) with altered hormone concentrations. Physical activity levels were approximately 50% lower in EXP than CON during physical training sessions.This is the first study to report a differential hormone response to contrasting physical conditioning regimen during BMT. The results indicate that the recruits who completed the EXP physical training regimen had an attenuated stress profile. This is an important observation, as any enhancement of recruit training outcomes are critical for Army noting that fundamentally, organisational capability is reliant upon the physical capability of its personnel.
Databáze: OpenAIRE
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