Can anyone answer me this, can too much excersice make you plateau or gain weight? I've been walking 2 1/2 miles 6 days a week and can't get past my current weight. I go up and I go down, I go up and I go down...I keep gaining and losing the same 8 lbs - and it's getting frustraing...So I would like to know if I'm doing too much excersise????