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Titolo:
EXERCISE BEFORE PUBERTY MAY CONFER RESIDUAL BENEFITS IN BONE-DENSITY IN ADULTHOOD - STUDIES IN ACTIVE PREPUBERTAL AND RETIRED FEMALE GYMNASTS
Autore:
BASS S; PEARCE G; BRADNEY M; HENDRICH E; DELMAS PD; HARDING A; SEEMAN E;
Indirizzi:
UNIV MELBOURNE,ENDOCRINE DEPT,AUSTIN & REPATRIAT MED CTR,ENDOCRINE UNIT MELBOURNE VIC 3084 AUSTRALIA UNIV MELBOURNE,ENDOCRINE DEPT,AUSTIN & REPATRIAT MED CTR,ENDOCRINE UNIT MELBOURNE VIC 3084 AUSTRALIA UNIV MELBOURNE,DEPT MED,AUSTIN & REPATRIAT MED CTR MELBOURNE VIC 3084AUSTRALIA B HERRIOT HOSP,INSERM,RES UNIT 403 LYON FRANCE UNIV MELBOURNE,DEPT PAEDIAT,AUSTIN & REPATRIAT MED CTR MELBOURNE VIC 3084 AUSTRALIA
Titolo Testata:
Journal of bone and mineral research
fascicolo: 3, volume: 13, anno: 1998,
pagine: 500 - 507
SICI:
0884-0431(1998)13:3<500:EBPMCR>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
RANDOMIZED CONTROLLED TRIAL; MINERAL DENSITY; PHYSICAL-ACTIVITY; LONG-TERM; IMMUNORADIOMETRIC ASSAY; OSTEOPOROTIC FRACTURES; POSTMENOPAUSAL WOMEN; SQUASH PLAYERS; RISK-FACTORS; MASS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
37
Recensione:
Indirizzi per estratti:
Citazione:
S. Bass et al., "EXERCISE BEFORE PUBERTY MAY CONFER RESIDUAL BENEFITS IN BONE-DENSITY IN ADULTHOOD - STUDIES IN ACTIVE PREPUBERTAL AND RETIRED FEMALE GYMNASTS", Journal of bone and mineral research, 13(3), 1998, pp. 500-507

Abstract

Exercise during growth may contribute to the prevention of osteoporosis by increasing peak bone mineral density (BMD). However exercise during puberty may be associated with primary amenorrhea and Bow peak BMD, while exercise after puberty may be associated with secondary amenorrhea and bone loss, As growth before puberty is relatively sex hormoneindependent, are the prepubertal years the time during which exerciseresults in higher BMD? Are any benefits retained in adulthood? We measured areal BMD (g/cm(2)) by dual-energy X-ragi absorptiometry in 45 active prepubertal female gymnasts aged 10.4 +/- 0.3 years (mean +/- SEM), 36 retired female gymnasts aged 25.0 +/- 0.9 years, and 50 controls, The results were expressed as a standardised deviation (SD) or Z score adjusted for bone age in prepubertal gymnasts and chronological age in retired gymnasts. Hn the cross-sectional analyses, areal BMD in the active prepubertal gymnasts was 0.7-1.9 SD higher at the weight-bearing sites than the predicted mean in controls (p < 0.01), The Z scares increased as tile duration of training increased (r = 0.32-0.48, p ranging between <0.04 and <0.002), During 12 months, the increase in areal BMD (g/cm(2)/year) of the fetal body, spine, and legs in the active prepubertal gymnasts mas 30-85% greater than in prepubertal controls(all p < 0.05), In the retired gymnasts, the areal BMD was 0.5-1.5 SDhigher than the predicted mean in controls at all sites, except the skull (p ranging between <0.06 and <0.0001). There was no diminution across the 20 years since retirement (mean 8 +/- 1 years), despite the lower frequency and intensity of exercise, The prepubertal years am likely to be an opportune time for exercise to increase bone density, As residual benefits are maintained into adulthood, exercise before puberty may reduce fracture risk after menopause.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/07/20 alle ore 08:05:14