S starfire New member Apr 19, 2010 #1 Im 15 years old, 5'4" and 114 lbs. How long should I run on the treadmill for and what kind of exercises should I do? I'd also like to tone my legs and arms. I'd appreciate any advice.
Im 15 years old, 5'4" and 114 lbs. How long should I run on the treadmill for and what kind of exercises should I do? I'd also like to tone my legs and arms. I'd appreciate any advice.
