11. Neglecting Rest Days
While getting sufficient exercise is a must if you’re going to boost your lean muscle mass and see high levels of testosterone surging through your veins, more exercise is not always better.
Rest days are critical.
Too much exercise can push you to the state of overtraining, where your entire hormonal balance will be shifted for the worse. Go here and it could be months before your natural testosterone levels are back to where they should be.