Frequency of Participation in an Employee Fitness Program and Health Care Expenditures

Regular physical activity is strongly linked to prevention of costly chronic health conditions. However, there has been limited examination of the impact that level of participation in physical activity promotion programs has on health care costs. This study examined a fitness reimbursement program (FRP) offered to small employers. FRP participants received $20 reimbursement every month they visited their fitness center ≥12 days. Visits were recorded electronically. Participants were assigned to 4 mutually exclusive cohorts by mean monthly fitness center visits: low (<4 visits); low-moderate (≥4 and <8 visits), high-moderate (≥8 and <12 visits), and high (≥12 visits, which qualified for reimbursement). Cohorts were matched by inverse propensity score weighting on demographic, health status, health care supply, and socioeconomic characteristics. Between-cohort differences in propensity score-weighted health care costs, starting from FRP program sign-up, were examined with a generalized linear model. Analyses were conducted with and without high-cost outliers during the pre- and post-FRP period. A total of 8723 participants (mean follow-up: 11.1 months) were identified during October 2010-June 2013. With high-cost outliers removed (n = 226), a pattern of lower per-member-per-month health care costs was observed with increasing participation: compared with the low cohort, monthly savings were: $6.14 (2.6%) for low-moderate (P = 0.60), $16.40 (6.9%) for moderate-high (P = 0.16), and $20.01 (8.4%) for high (P = 0.08). With high-cost outliers included, significant monthly cost savings were observed for the moderate-high ($43.52, P < 0.01) and high ($52.66, P < 0.001) cohorts. These results indicate directionally positive cost outcomes associated with increasing level of fitness center participation.