| Autor: |
Frisch, Rose E., Gotz-Welbergen, Astrid V., McArthur, Janet W., Albright, Tenley, Witschi, Jelia, Bullen, Beverly, Birnholz, Jason, Reed, Robert B., Hermann, Howard |
| Zdroj: |
JAMA: Journal of the American Medical Association; October 1981, Vol. 246 Issue: 14 p1559-1563, 5p |
| Abstrakt: |
Age at menarche and menstrual periodicity of 21 college swimmers and 17 runners were studied in relation to the age of initiating training. The 18 premenarche-trained athletes had a mean menarcheal age of 15.1±0.5 years, whereas the 20 postmenarche-trained athletes had a mean menarcheal age of 12.8±0.2 years, similar to that of the college control subjects, 12.7±0.4 years. Each year of training before menarche delayed menarche by five months (0.4 years). Of the premenarche-trained athletes, 61% had irregular menstrual cycles and 22% were amenorrheic, whereas 60% of the postmenarche-trained athletes had regular menstrual cycles and none were amenorrheic. Training increased the incidence of oligomenorrhea and amenorrhea among both premenarche- and postmenarche-trained athletes. Metabolic and hormonal changes consequent to an increased lean/fat ratio may explain these findings.(JAMA 1981;246:1559-1563) |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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