Exercising for 3 hours each day isn't a sustainable habit for anyone except perhaps Dwayne "The Rock" Johnson. Mr. Cahill gained close to 60 lbs over a four yea

Exercising for 3 hours each day isn't a sustainable habit for anyone except perhaps Dwayne "The Rock" Johnson. Mr. Cahill gained close to 60 lbs over a four year period. At that rate, it sounds like he was on his way to regaining the weight as soon as the program was over, rather than just when he returned to his surveyor job. When your resting metabolism is 400-600 calories too low, the fate of your weight loss goals is pretty much sealed.