bicycling is not the best work out for a runner, especially a sprinter. You should try running 200m sprints x 6-8. or, you can try running 100m, then 200m, the 400m, then 200m, then 100m. this will improve your stamina. don't stop in between but walk or jog for about 6-10 minutes. but you shouldn't sprint all in one go. do you regularly sprint or is this your first time? And you should deffinatly NOT run or work out everyday. you need atleast one resting day.