This subproject is one of many research subprojects utilizing theresources provided by a Center grant funded by NIH/NCRR. The subproject andinvestigator (PI) may have received primary funding from another NIH source,and thus could be represented in other CRISP entries. The institution listed isfor the Center, which is not necessarily the institution for the investigator.This study is closed.Our research has shown that aerobic exercise performed in the morning increases the oxidation of fat in a breakfast, lunch or dinner that is eaten during the day after completion of the exercise. Many individuals, however, prefer resistance training, using weights or other forms of resistance to aerobic exercise. We have therefore begun this study to compare the effects of a single bout of weight lifting with a bout of aerobic (bicycle) exercise that burns the same number of calories. Subjects studied performed 1 hour of weigth lifting, 1 hour of moderate bicycle exercise or 1 hour of sitting and reading. Each exercise bout burned about 150 kcal more than the same period of rest. We measured the rate at which they burn fat calories from a breakfast given to them after the exercise. Oxidation of dietary fat eaten in a meal after completion of the exercise was increased by about one-fourth and the increase was similar for both weight lifting exercise and bicycle exercise. Thus weight lifting does increase the amount of dietary fat burned and this reduces the amount that goes to fat stores during the 12 hours after the meal. The effect is about the same for weight lifting and aerobic exercise.
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