Does having excess bodyfat adversely affect muscular gains? That was the focus of a recent study featuring 140 normal-weight and 81 overweight men and women who hadn’t trained in more than a year.1 They began training twice a week for 12 weeks, doing one-arm biceps curls. The researchers adjusted the training responses for bodyweight and initial values and found that the normal-weight group had made better gains than the overweight group. That led them to conclude that there’s something about being fat that hinders muscular gains.
1 Kelsey, B., et al. (2004). Adiposity alters muscle strength and size responses to resistance training in healthy men and women. Med Sci Sports Exerc. 36:S352.
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