I got into shape because I took kick-boxing lessons every day to prepare for a fight scene with Taylor Lautner. I really wanted to lie down and eat Chinese food but I kick-boxed every morning and ran. If someone was filming you with your kit off you'd do the same thing.
Man's mind is like a store of idolatry and superstition so much so that if a man believes his own mind it is certain that he will forsake God and forge some idol in his own brain.