I know you can overtrain your muscles, by over doing your training. What about cardio, can you "overtrain" your system by doing too much cardio? What is the ideal amount of cardio you should do in one day? I mean, just because you can keep going doesn't mean it's healthy does it? I do about 60-90 minutes of cardio, three days a week to burn off the fat. I just started this a few days ago. Is this enough, too little, or too much???
Thnx
Teirnox