1. The effect of mindfulness training on athletes' flow: An initial investigation;Aherne;The Sport Psychologist,2011
2. ACSM's guidelines for exercise testing and prescription;American College of Sports Medicine,2017
3. Update on the global pandemic of physical inactivity;Andersen;The Lancet,2016
4. Reversal theory: Motivation, emotion, and personality;Apter,1989
5. The runner's high: Opioidergic mechanisms in the human brain;Boecker;Cerebral Cortex,2008