AI Summary

A recent study has found that mice bred to be more athletic do not experience any negative effects on their fertility or lifespan. The research, which spanned 30 years, challenges the conventional understanding of the relationship between athleticism and reproductive or longevity costs. This long-held assumption suggests that intense physical activity would come at the expense of other aspects of an organism's life. The findings of this study suggest that this assumption may not be universally applicable, at least in the case of mice bred for enhanced endurance.

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