Negative z-scores however were only seen for selleck kinase inhibitor spine BMD, and no skater in any discipline had a z-score outside of
2 standard deviations of the mean. Figure 1 Comparison of site specific bone mineral density z scores among skater type. Significant differences by ANOVA: *p = 0.003 for Single and Pairs vs Dancer; **p < 0.001 Single vs Dancer; †p = 0.001 Single vs Dancer. Predictors of bone mineral density When controlling for all other variables, skater discipline (single, pair, or dancer) and BMI were the only significant predictors of total and all site-specific BMD regions measured in our model. Skaters with the lowest BMI had the lower BMD scores across all BMD regions measured except the pelvis. While there was no significant difference in BMI among the 3 skater disciplines, regression analysis showed that total SB431542 clinical trial BMD increased with increasing BMI in the total group of skaters (R = 0.60; p < 0.001). The effect of skater discipline on BMD variables is shown in Figure 1. Single and pair skaters each had higher z scores for total body BMD than did dancers. This was significant for single vs dancer skaters. Both single and pair skaters had significantly higher pelvic z scores than dancer skaters. Single skaters also had significantly higher leg z scores than dancer skaters. There was no significant difference in spine z-scores among the three groups. Discussion The female athlete triad refers to
the interrelationships among energy availability, menstrual function, and bone mineralization. If energy deficits are extreme, and
body weight and fat mass are very low, estrogen levels fall, with delayed menarche in younger girls and menstrual irregularities. [9] Bone demineralization may ensue, particularly when intakes of vitamin D and calcium are insufficient, ultimately MRIP increasing stress fracture risk. Low energy intakes and suboptimal amounts of bone building nutrients have been reported in figure skaters [10–12]. The degree in which bone loading and physical training counterbalances the detrimental effects of poor nutrition on bone density in this unique group of athletes has not been studied. Furthermore, stratifying by skater discipline, as a proxy for the extent of mechanical loading experienced, has never been attempted, and is the greatest contribution of this study. The Academy of Sports Medicine recommends that the WHO criteria (z-score of −2.0) be used for identifying risk of osteoporosis in adult female athletes [13]. Defining BMD z-scores cut-offs for predicting fracture risk in adolescents is more difficult, as there is selleck chemicals llc insufficient data on how to adjust BMD for bone size, pre-pubertal age, and skeletal maturity in growing children. The International Society for Clinical Densitometry states that children with a total body BMD z-score of −2.0 (using a pediatric database matched for age and gender) are considered to have “low bone mineral density for chronological age”.