![]() With appropriate training, track and field athletes may be able to minimize losses in LM and gains in FM between seasons. Evaluation of muscle characteristics in addition to total and regional body composition may be valuable for improving performance, injury prevention, and assessing health risks. After one year, relative armLM increased slightly in all event groups (p<0.05). Despite high FM, throwers had lower EI (63.4 ± 5.2 a.u). 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<0.05). Body composition measurements were repeated a year later in a subset of returning athletes (n=33). A panoramic scan of the vastus lateralis was taken with B-mode ultrasound to determine muscle cross sectional area (mCSA) and echo intensity (EI). Total and regional body composition measurements were assessed using dual-energy x-ray absorptiometry. ![]() 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. 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.
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