The Influence of Organized Physical Activity (Including Gymnastics) on Young Adult Skeletal Traits: Is Maturity Phase Important?
| Autor: | Bernardoni, Brittney, Scerpella, Tamara A., Rosenbaum, Paula F., Kanaley, Jill A., Raab, Lindsay N., Quefeng Li, Sijian Wang, Dowthwaite, Jodi N. |
|---|---|
| Předmět: |
ANALYSIS of bones
ANALYSIS of variance ANTHROPOMETRY CHI-squared test STATISTICAL correlation GYMNASTICS MENARCHE SCIENTIFIC observation RESEARCH funding STATISTICAL hypothesis testing PILOT projects REPEATED measures design PHYSICAL activity DATA analysis software DESCRIPTIVE statistics PHOTON absorptiometry MANN Whitney U Test |
| Zdroj: | Pediatric Exercise Science; 2015, Vol. 27 Issue 2, p285-294, 10p, 5 Charts |
| Abstrakt: | We prospectively evaluated adolescent organized physical activity (PA) as a factor in adult female bone traits. Annual DXA scans accompanied semiannual records of anthropometry, maturity, and PA for 42 participants in this preliminary analysis (criteria: appropriately timed DXA scans at ~1 year premenarche [predictor] and ~5 years postmenarche [dependent variable]). Regression analysis evaluated total adolescent interscan PA and PA over 3 maturity subphases as predictors of young adult bone outcomes: 1) bone mineral content (BMC), geometry, and strength indices at nondominant distal radius and femoral neck; 2) subhead BMC; 3) lumbar spine BMC. Analyses accounted for baseline gynecological age (years pre- or postmenarche), baseline bone status, adult body size and interscan body size change. Gymnastics training was evaluated as a potentially independent predictor, but did not improve models for any outcomes (p > .07). Premenarcheal bone traits were strong predictors of most adult outcomes (semipartial r2 = .21-0.59, p ≤ .001). Adult 1/3 radius and subhead BMC were predicted by both total PA and PA 1-3 years postmenarche (p < .03). PA 3-5 years postmenarche predicted femoral narrow neck width, endosteal diameter, and buckling ratio (p < .05). Thus, participation in organized physical activity programs throughout middle and high school may reduce lifetime fracture risk in females. [ABSTRACT FROM AUTHOR] |
| Databáze: | Complementary Index |
| Externí odkaz: |
|