"You will not quit." Jay Hewitt knows the meaning of "motivation". He's in training for the World Championship Ironman Triathlon, billed as the most grueling one-day race in the world.
Mazur
Marcia Levine
ML
D000328:Adult; D003922:Diabetes Mellitus, Type 1 / Q000503:physiopathology* / Q000523:psychology; D006801:Humans; D008297:Male; D009042:Motivation; D010807:Physical Endurance; D013177:Sports; D014481:United States