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Muscle fiber types related to obesity

Published in Women's Health Weekly, July 18th, 2002

by Maria G. Essig, MS, ELS, senior medical writer - Percentage of type I muscle fibers is higher in lean women than in obese women, say U.S. researchers writing in the American Journal of Physiology - Endocrinology and Metabolism.

C. J. Tanner and collaborators at the East Carolina University Human Performance Laboratory studied the relationships between obesity and muscle fiber type in obese (n=25, average BMI 34.8 kg/m2) and nonobese women (n=28, average BMI 24.0 kg/m2), Caucasian and African-American women, and in obese adults who had lost weight as a result of gastric bypass surgery.

A significant difference...

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