Basically i need to get real fit, like as fit as i can get plus more!! Right now im extremely unfit, so unfit i gasp for air when i run up a small flight of stairs. Im not overweight or anything, im in good size, i just havent done good cardio in years (i no its bad ).
Anyway what i want to know is can you do too much cardio in one day that you wont acctually increase in fitness?? By this i mean can i do intense cardio in the morning then AGAIN at night ??
Also whats the best way to get really fit? are there any good tricks to building up a good fitness?
Im not concerned about shedding bodyfat as i have done a search on cardio but most threads about losing BF. I just need to get my heart and lungs really strong, and im sure ill lose fat along the way anyway.