Impact of Small Monetary Incentives on Exercise in University Students

Objectives: Research has demonstrated that health outcomes are significantly improved with the application of financial incentives. However, relatively larger incentives are not typically sustainable and removal of incentives tends to result in attrition of behavior. The feasibility of using relatively smaller incentives to improve physical activity is unclear. The aim of the present study is to determine whether small financial incentives (maximum $5.00 per week) can improve exercise-related energy expenditure of inactive individuals. Methods: Twenty-two university students (20 ±1.6 years old) were randomized into incentive or non-incentive conditions. Exercise-related caloric expenditure was tracked over 10 weeks. Results: The sample size yielded 62% power. The repeated measures ANCOVA, controlling for body mass index, indicated a main effect of condition (F = 5.50, p =.03) with no significant interaction (F = 2.25, p = .06). Conclusions: This pilot study demonstrates initial feasibility in implementing small financial incentives to promote exercise behavior in previously inactive young adults. Due to the small sample size, results should be interpreted with caution and further research is warranted to improve and maintain exercise behavior in response to relatively smaller incentives.