probably... i think most beginning runners try to go too fast, get winded and tired and quit. i'm assuming you're somewhat fit from cycling (like say you can ride 20 miles or more) and you're not excessively overweight. is so, you should be able to run at least 2 or 3 miles at a really slow pace. if not, walk it or alternate between running and walking and in a few weeks you'll soon be running the whole 2-3 miles and can either do more miles or run at a faster pace.