Impact of exercise on bone health and contraindication of oral contraceptive use in young women.
Med Sci Sports Exerc
; 33(6): 873-80, 2001 Jun.
Article
en En
| MEDLINE
| ID: mdl-11404650
PURPOSE: The effect of quantified resistance and high impact exercise training on bone mass as modified by age and oral contraceptive (OCont) use in young women was studied. METHODS: Women were categorized by age (18-23 vs 24-31 yr) and OCont use, and were then randomized into either three sessions of resistance exercise plus 60 min.wk-1 of jumping rope or a control group for 24 months. Total body, spine, femoral neck, greater trochanter, Ward's area, and radial bone mineral density (BMD) and/or content (BMC), biochemical markers of bone turnover, dietary intake of calcium, lean body mass, maximal oxygen uptake, and strength were determined at baseline and every 6 months. RESULTS: Total body (TB) BMC percent change from baseline was higher in exercisers compared with nonexercisers at 6 and 24 months. OCont users had lower bone turnover at baseline and a decrease in TBBMC from baseline compared with non-OCont users at 24 months. Spine BMC and BMD decreased in the exercise and OCont group at 6 months and remained significantly below nonexercisers who used oral contraceptives at 2 yr. Femoral neck BMD also decreased in the exercise and oral contraceptive group at 6 months. CONCLUSIONS: Exercise prevented a decline in TBBMC seen in the nonexercisers. On the other hand, exercise in oral contraceptive users prevented the increase observed in the spine of the nonexercise plus OCont group.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Ejercicio Físico
/
Densidad Ósea
/
Anticonceptivos Orales
Tipo de estudio:
Clinical_trials
Aspecto:
Patient_preference
Límite:
Adolescent
/
Adult
/
Female
/
Humans
Idioma:
En
Revista:
Med Sci Sports Exerc
Año:
2001
Tipo del documento:
Article
País de afiliación:
Estados Unidos
Pais de publicación:
Estados Unidos