Frey, Bruno S., and Felix Oberholzer-Gee. "The Cost of Price Incentives: An Empirical Analysis of Motivation Crowding-Out." American Economic Review 87, no. 4 (September 1997): 746–755.

When it comes to staying active, the biggest challenge often isn’t the workout itself—it’s finding the motivation to start and stay consistent. With busy schedules, varying energy levels and ...