"I did 1.5 miles in 30 minutes."
when i first read that i thought you were talking about your car... haha

but yea. i've been working out for the last 5 months or so without any aerobic exercise and when i went out to run a couple days ago i was extremely tired after half a mile. you should try swimming, it's real good for you to help your body get slimmer and more fit. it's also easy on the joints.