Results: Age of gymnasts was positively associated with BMD at all measured sites (p \u3c0.001; r=0.62-0.68). Weight was positively associated with BMD at all measured sites (p \u3c0.001; r=0.82-0.90). Lean body mass was positively associated with BMD at all measured sites (p \u3c0.001; r=0.74-0.87). Body fat percentage was positively associated with BMD at all measured sites (p \u3c0.001-p=0.01; r=0.39-0.54). However, calcium intake was not significantly associated with any of the BMD sites. Sunlight exposure and indirect estimates of vitamin D were not significantly associated with any of the BMD sites; all r-values indicated a weak positive association with BMD. Of the gymnasts who had experienced menses (n=15), those with regular menstrual periods (n=8) had significantly higher BMD values at the arm, leg, trunk, rib, and spine, and total body than those who did not have regular menstrual periods (n=7). There was no significant difference in BMD for gymnasts who had regular periods at the pelvis. A regression analysis was performed. The predictors total BMD values from the regression equation were the following: regular menses, height, weight, percent kilocalorie requirement consumed from predicted kilocalorie needs, calcium intake with supplements, lean body mass, hourly deficits \u3e300 kilocalories from predicted kilocalorie needs, and hourly surpluses \u3e300 kilocalories from predicted kilocalorie needs
