title: Short term aerobic exercise alters the reinforcing value of food in inactive adults.
abstract: Motivation to eat, or the reinforcing value of food, may be influenced by a number of factors, including physical activity. The purpose of these studies was to test the hypothesis that short-term moderate-vigorous intensity aerobic exercise would alter the reinforcing value of high (HED) and low (LED) energy density foods in inactive adults. The reinforcing value of LED and HED food was measured at baseline and again after two weeks of aerobic exercise. In Experiment 1, 41 participants were randomized to a no exercise condition or aerobic exercise for 3 days per week for two weeks. In Experiment 2, 76 participants were randomized to one of four aerobic exercise frequencies, 0, 1, 3, or 5 days per week for two weeks. In both experiments, exercise reduced the reinforcing value of HED food compared to baseline and to non-exercise controls. In Experiment 2, the 5 day group also showed a significant increase in the reinforcing value of LED food compared to baseline and other exercise frequencies. Liking of HED and LED foods and consumption of HED food were not affected by exercise treatment. Finally, in Experiment 2, the 5 day group reported consuming more energy outside of the laboratory than the other groups. Taken together, these data suggest, in inactive individuals, motivation to obtain HED and LED foods can be altered with a short-term moderate-vigorous intensity exercise intervention. Further research is needed to understand the cognitive and physiological processes involved in food choices paired with exercise.
authors.affiliation: Department of Exercise and Nutrition Sciences, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY, USA.
authors.forename: Leah M
authors.initials: LM
authors.lastname: Panek
authors.affiliation: Department of Exercise and Nutrition Sciences, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY, USA.
authors.forename: Kelly R
authors.initials: KR
authors.lastname: Jones
authors.affiliation: Department of Exercise and Nutrition Sciences, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY, USA; Department of Community Health and Health Behavior, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY, USA. Electronic address: jltemple@buffalo.edu.
authors.forename: Jennifer L
authors.initials: JL
authors.lastname: Temple
mesh_terms: D000293:Adolescent; D000328:Adult; D001827:Body Height; D015992:Body Mass Index; D001835:Body Weight; D002755:Choice Behavior; D002149:Energy Intake; D015444:Exercise / Q000502:physiology*; D005247:Feeding Behavior; D005260:Female; D005518:Food Preferences; D015438:Health Behavior; D006801:Humans; D008297:Male; D008875:Middle Aged; D009042:Motivation; D012054:Reinforcement, Psychology; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires; D055105:Waist Circumference; D055815:Young Adult
keywords: Energy density; Exercise; Food reinforcement; Reinforcing value; Sedentary