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Exerc Sport Sci Rev. 2003 Jul;31(3):144-8.

Energy availability, not body fatness, regulates reproductive function in women.

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Department of Biological Sciences, Ohio University, Athens 45701-2979, USA.


The morbid consequences of menstrual disorders in athletes require medical diagnosis and treatment. Reproductive disruption appears to occur when energy availability (dietary energy intake minus exercise energy expenditure) falls below a threshold between 20 and 30 kcal x kgLBM(-1) x d(-1), and some women may be more severely affected than others by subthreshold energy availability.

[Indexed for MEDLINE]

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