As a post-doc I remember noticing that the parking garage was free, but the gym cost money.
What you subsidize is what people will do!
Dr. Katherine Haenschen
University students who were provided with a free gym card (in a randomized experiment) exercised more and had a significant improvement in academic performance. The treated students were also less likely to drop out of classes
www.journals.uchicago.edu/doi/full/10....
