For the past two months, I have been Mr. Fitness. I lift every other day, and run in between. I just recently really got into mountain biking, and have gained such a love, that I no longer wanna spend my energy and time running when I could be biking. So, is this a pretty even trade off? Ive developed a nice 6 pack running and working out, I wanna keep improving, but dont feel that biking cuts it. Theres just no other exercise that makes you feel like youve actually done something as running does IMO.