Baseline characteristics of players at 2009 preseason (n=37)
| Age (years) | 24.3(3.8) |
| Weight (kg) | 95.3(10.4) |
| Height (m) | 1.81(0.06) |
| BMI (kg/m2) | 29.0(2.3) |
| BPAQ past | 72.4(26.9) |
| BPAQ current | 7.5(1.0) |
| BPAQ total | 40.0(13.5) |
| Age began playing rugby league (years) | 8.0(3.8) |
| WB BMD (g/cm2) | 1.251(0.088) |
| WB BMD Z-score | 1.13(0.50) |
| Total daily energy (kJ) | 11 052(3678) |
| Daily Ca2+ (mg) | 1224(454) |
BMI, body mass index; BPAQ, bone-specific physical activity; Ca2+, calcium; WB BMD, whole body bone mineral density.