| Autor: |
YU, CLARE C.W., SUNG, RITA Y.T., SO, RAYMOND C.H., LUI, KAM-CHI, LAU, WINNIE, LAM, PEGGO K.W., LAU, EDITH M.C. |
| Zdroj: |
Journal of Strength & Conditioning Research; Aug2005, Vol. 19 Issue 3, p667-672, 6p |
| Abstrakt: |
The purpose of this study was to test the hypothesis that strength training benefits diet-controlled obese children with respect to lean mass and bone mineral acquisition. Eighty-two Hong Kong school children (aged 10.4 ± 1.0 years, 70 in Tanner stage 1, 12 in stage 2) who were obese/overweight were randomly assigned to receive either a balanced low-energy (900-1200 cal) diet plus strength training (n = 41) (training group) or the diet alone (n = 41) (control group). The training group attended a 75-minute strength exercise program 3 times/week for 6 weeks (phase 1), after which they were offered and 22 children opted to continue a once-weekly program for a further 28 weeks (phase 2). All children were evaluated at baseline, after 6 weeks, and at the end of the 36-week study (including an intervening 2-week introduction to phase 2). Body composition and bone mineral content were measured by dual-energy X-ray absorptiometry, and diet was assessed by food-frequency questionnaire. The results showed that the exercise programs were well accepted, with good attendance at the exercise classes. After 6 weeks, the children in the training group showed significantly larger increases in lean body mass (1 0.8 kg [2.4%] vs. 10.3 kg [1.0%], p < 0.05) and total bone mineral content (146.9 g [3.9%] vs. 133.6 g [2.9%], p < 0.05) than those in the control group. At the end of the study, these trends were maintained in the continued-training subgroup, though no longer reaching statistical significance. We conclude that in diet-controlled prepubertal obese/over-weight children, participation in an exercise program with emphasis on strength training resulted in improved lean mass and bone mineral accrual. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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