Table 6. Stepwise Multiple Regression predicting bone mineral density (BMD) from isotonic leg strength variables in combined age groups. BMD Site Predictor Variable β SEE R2 Total Body Quadriceps 1-RM .402 .116 .150 *** Spine none Femoral Neck Quadriceps 1-RM .423 .112 .501 *** Age -.371 Trochanter Quadriceps 1-RM .395 .156 .144 *** Total Hip Quadriceps 1-RM .650 .114 .414 *** RM = repetition maximum. Independent variables: age, quadriceps 1-RM, and hamstrings 1-RM. *** p < 0.001.