I typically have a few hours to kill during the morning and at night. I've already started working out at night - each trip to the gym being at least an hour, with about 30 minutes dedicated to weights and 30 minutes to cardio. Since I usually just sit around the house kinda bored during the day, would it hurt me to go to the gym and bust out another 30 minutes of cardio or so? I've heard the term "overtraining," though, I'm not really sure what the consequences are. First of all, what is overtraining? Secondly, would that plan be considered overtraining? Thirdly, what are the effects of overtraining.
Basically, I'm tired of being an disgusting fat-body and want to look decent before summer's end. My diet is pretty good, so I've been told, but I have added a Blueberry smoothie to it, as I was only getting about 1500-1600 calories out of it before. Now I'm getting 1900-2000 calories.