Comparisons of Bone Mineral Density Between Recreational and Trained Male Road Cyclists

Objective: To compare measures of training, performance, body composition, and areal bone mineral density (aBMD) between age-matched recreational and competitively trained male road cyclists. Design: Cross-sectional. Setting: Laboratory. Participants: Male cyclists (N = 28) aged 21–54 years riding more than 3 hours per week. Assessment of Risk Factors: Men who train at high (≥8 h/wk) and moderate volumes (3–8 h/wk). Main Outcome Measures: Areal bone mineral density assessments by dual energy x-ray absorptiometry of the whole body, lumbar spine (L1-L4), right and left hips, maximal oxygen uptake (V[Combining Dot Above]O2max), and training history. Results: Trained cyclists had higher power to weight (5.3 ± 0.4 vs 4.7 ± 0.3 W/kg, P = 0.001), V[Combining Dot Above]O2max (57.2 ± 4.5 vs 53.0 ± 6.1 mL·kg−1·min−1, P = 0.049) and training volume (10.6 ± 2.1 vs 6.3 ± 0.9 h/wk, P

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