| Autor: |
Ianc, Dorina, Serbescu, Carmen, Bembea, Marius, Benhamou, Laurent, Lespessailles, Eric, Courteix, Daniel |
| Předmět: |
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| Zdroj: |
International Journal of Sport Nutrition & Exercise Metabolism; Dec2006, Vol. 16 Issue 6, p580-596, 17p, 1 Diagram, 12 Charts, 1 Graph |
| Abstrakt: |
We investigated the effects of calcium supplementation and physical practice on the bone ultrasound properties and trabecular microarchitecture in children. 160 children aged 8-11 were randomly allocated to active or nonactive groups and to receive either a calcium-phosphate or a placebo powder for 6 months. Skeletal status was assessed using an ultrasound technique, which measures the speed of sound (Ad-SoS, m/s) at the phalanx. Bone microarchitecture was characterized by fractal analysis measured on calcaneus radiographs and the result expressed as the Hmean parameter, that has been shown to a good reliability of the bone texture quality. After 6 months, the calcium group had significantly gained Ad-SoS compared to the placebo group (P = 0.01) and Hmean increase was greater in the active than the nonactive group (P < 0.05). Exercise and calcium supplementation had a differential effect on the bone tissue, calcium being rather linked to a systemic effect whereas exercise has acted better onto the skeletal stressed site. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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