Increasing the Reinforcing Value of Exercise in Overweight Adults

Frontiers in Behavioral Neuroscience

Kyle D. Flack¹  Kelsey Ufholz²  James N. Roemmich²  LuAnn Johnson² 

[1] Department of Dietetics and Human Nutrition, University of Kentucky, Lexington, KY, United States;United States Department of Agriculture-Agricultural Research Service (USDA-ARS), Grand Forks Human Nutrition Research Center, Grand Forks, ND, United States;

关键词: exercise;    motivation;    reward;    dopamine;    incentive sensitization;   

DOI  :  10.3389/fnbeh.2019.00265

来源: DOAJ

【 摘 要 】

Objectives: This study determined whether a moderate- or high-dose exercise program increases exercise reinforcement. Increasing the relative reinforcing value of exercise (RRVexercise; i.e., incentive sensitization of exercise) may increase the usual physical activity (PA) participation. Preference and/or tolerance for the intensity of exercise was also assessed.Design: Sedentary men and women (body mass index, BMI: 25–35 kg/m2) were randomized into parallel exercise training groups expending either 300 (n = 18) or 600 (n = 18) kcal/exercise session, five sessions/week, for 12 weeks.Methods: The RRVexercise was determined by how much work was performed for exercise relative to a sedentary alternative in a progressive ratio schedule task. Preference and tolerance for exercise intensity were determined by questionnaire.Results: RRVexercise increased (P < 0.05) in both groups. Exercise reinforcement, defined as the amount of work completed for exercise without taking sedentary activity into account, increased (P < 0.01) in the 600 kcal group only. Preference and tolerance for exercise intensity increased (P < 0.01) in both groups, which predicted increases in RRVexercise.Conclusion: Expending 300 or 600 kcal, 5 days/week increases RRVexercise, while 600 kcal, 5 days/week may be needed to increase exercise reinforcement.

【 授权许可】

Unknown