HELP!! My endurance/cardio is pretty much not even existing. I try and run a few miles but after two mins. (seriously...two mins) my shins start to hurt and my legs burn. I dont have asthma. I have been lifting hard for about 2 years. I have less then a min rest between sets. And i can lift for hours without fatigue setting in. I just cant run. Or build my cardio up at all. Anyone have any advice. I tried the eliptical but damn that shit is boring. I will run for five mins tops before my legs just start to be unbearable (whether it be on a tread mill or street) I really want to work on my cardio so i can start some Muay Thai Training. (there is a great MMA gym right down the street from me) If you need any more info just ask ill provide. Thanks