You're spot on. I like to think it's analogous to over training if you're a body builder. After a certain amount of time, 3+ hours you are even causing more har

You're spot on. I like to think it's analogous to over training if you're a body builder. After a certain amount of time, 3+ hours you are even causing more harm, than good, training. People need to realize we aren't designed to be 'hard workers' only smart workers.