Original scientific paper

Relationship of endogenous testosterone levels to lean body mass in the young and middle-aged physically active - sportsmen

A. C. Hackney ; University of North Carolina, Chapel Hill, NC, USA
Kristin Polzien ; University of North Carolina, Chapel Hill, NC, USA
Kelli Dutrow ; University of North Carolina, Chapel Hill, NC, USA

Abstract

The purpose of this study was to examine the endogenous circulating testosterone levels and lean body mass (LBM) in young to middle-aged physically active - sportsmen to determine, whether there any relationships between these parameters in normal circumstances (i.e., no medical problems or pharmacolo- gical manipulations). Healthy, drug-free men (n=127) were recruited for testing (mean±SD, age 25.0±4.8 yr). Morning blood samples were obtained and underwater weighing was performed to determine the body composition (the measures were: LBM, fat weight [FW], body fat percentage [%fat]). Testosterone (T) was analyzed via RIA. Correlation analysis was performed to determine if thee were any significant relationships between the measures. Coefficients between T and LBM (r = 0.266), FW (r = -0.255), and %fat (r = -0.280) were significant (p<0.005). These findings show that endogenous testosterone and LBM are significantly related to one another in physically active men; however, the magnitude of the relationship is moderate at best. This suggests that the LBM component of men (which is comprised primarily of muscle mass) is related to circulating testosterone levels; but it is also strongly influenced by other factors.

Keywords

anabolic hormones; muscle mass

Hrčak ID:

225178

URI

https://hrcak.srce.hr/225178

Publication date:

1.12.2001.

Article data in other languages: german croatian

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