"Sport feels less strenuous if you believe it’s doing you good Sport feels less strenuous if..."

“Sport feels less strenuous if you believe it’s doing you good Sport feels less strenuous if you believe it’s doing you good”

- https://www.sciencedaily.com/releases/2017/06/170630105031.htm

source http://physiquesportsuk.tumblr.com/post/162475812999