HHS Public Access Author manuscript Author Manuscript
J Strength Cond Res. Author manuscript; available in PMC 2017 May 01. Published in final edited form as: J Strength Cond Res. 2016 May ; 30(5): 1231–1238. doi:10.1519/JSC.0000000000001203.
Body Composition and Muscle Characteristics of Division I Track and Field Athletes Katie R. Hirsch1, Abbie E. Smith-Ryan1, Eric T. Trexler1, and Erica J. Roelofs1 1Applied
Physiology Laboratory Department of Exercise & Sport Science University of North Carolina at Chapel Hill Chapel Hill, North Carolina, USA
Author Manuscript
Abstract
Author Manuscript
The purpose of this study was to evaluate event-specific body composition and muscle characteristics of track and field athletes, and to assess body composition changes after one year. Sixty collegiate track and field athletes (Mean ± SD; Age = 19.2 ± 1.4 yrs, Height = 174.6 ± 9.0 cm, Weight = 71.5 ± 12.5 kg) were stratified into six event groups. Total and regional body composition measurements were assessed using dual-energy x-ray absorptiometry. A panoramic scan of the vastus lateralis was taken with B-mode ultrasound to determine muscle cross sectional area (mCSA) and echo intensity (EI). Body composition measurements were repeated a year later in a subset of returning athletes (n=33). Throwers had significantly more absolute fat mass (FM; 21.6 ± 11.0 kg), total body mass (89.7 ± 17.4 kg), percent fat (23.6 ± 7.8) and trunk fat (9.4 ± 5.8 kg) than all other event groups (p0.05), but relative to body mass had relatively less LM (0.72 ± 0.08 kg; p
J Strength Cond Res. Author manuscript; available in PMC 2017 May 01. Published in final edited form as: J Strength Cond Res. 2016 May ; 30(5): 1231–1238. doi:10.1519/JSC.0000000000001203.
Body Composition and Muscle Characteristics of Division I Track and Field Athletes Katie R. Hirsch1, Abbie E. Smith-Ryan1, Eric T. Trexler1, and Erica J. Roelofs1 1Applied
Physiology Laboratory Department of Exercise & Sport Science University of North Carolina at Chapel Hill Chapel Hill, North Carolina, USA
Author Manuscript
Abstract
Author Manuscript
The purpose of this study was to evaluate event-specific body composition and muscle characteristics of track and field athletes, and to assess body composition changes after one year. Sixty collegiate track and field athletes (Mean ± SD; Age = 19.2 ± 1.4 yrs, Height = 174.6 ± 9.0 cm, Weight = 71.5 ± 12.5 kg) were stratified into six event groups. Total and regional body composition measurements were assessed using dual-energy x-ray absorptiometry. A panoramic scan of the vastus lateralis was taken with B-mode ultrasound to determine muscle cross sectional area (mCSA) and echo intensity (EI). Body composition measurements were repeated a year later in a subset of returning athletes (n=33). Throwers had significantly more absolute fat mass (FM; 21.6 ± 11.0 kg), total body mass (89.7 ± 17.4 kg), percent fat (23.6 ± 7.8) and trunk fat (9.4 ± 5.8 kg) than all other event groups (p0.05), but relative to body mass had relatively less LM (0.72 ± 0.08 kg; p
