Where did i mention marathon runner? Usain Bolt trains 3 hours per day, 7 days per week. Weights, foot work, plyometrics...etc. The human body WILL adapt or you will die. Simple as that. Overtraining in the conventional sense is a bunch of malarkey perpetrated by the supplement companies as an excuse to tell you why you aren't getting "them gainz". Here's some HMB. That'll help.
you never did mention a marathon runner-this was mentioned by Mike Mentzer
not turning this as of a pissing contest but you state that the human body WILL adapt or you will die??? so why not work out 6-10 hours a day? Because you will die?
if overtraining is a myth then you should be able to do this-correct?