hi, i'm 14 years old (15 in October) i am 5' 8" with a slim build and i weigh 136lbs. i would like help with my fitness and short distance running. i don't really do much training at all, although i do press ups, and upper and lower ab exercises. but i don't really know what i'm doing. so could you suggest an appropriate workout for me that will improve my overall fitness, but particularly my 400m running (and i would also like to improve my sprinting). i don't have access to a gym, and ATM i don't have any equipment, but i'm going to get some soon, but i don't really know what equipment would be necessary for me to start with. so any suggestions for equipment (that doesn't cost loads)?
cheers
cheers