From Women's Health (Oct. 2008)
"People who do both aerobic and resistance training eat less than those who do one or the other, reports a study in the Journal of Sports Science and Medicine. For 16 weeks, subjects did cardio, lifted weights, or combined the two while reporting everything they ate. Those who did double duty ate 517 fewer calories per day by the end of the study. The combo may cause a shift in hormones that control appetite, says study co-author Grogory Brown, Ph.D."