Thats a myth. You need a combination of aerobic exercise and strength training. You're strength training should use weights that are heavy enough to exhaust your muscles and complete the exercises using proper form.
You won't get "big". You'll get just the way God intended you. :)
Try this: www.youtube.com/user/ZuzkaLight
Edited by: MADDERMAUS at: 7/7/2012 (18:41)