How to Do calf drops to stretch the calves and prevent Achilles tendonitis

Calf drops are simple exercises that produce big results. Calf drops involve standing up on your toes on an elevated plank, shifting your weight to one foot, and then lowering yourself down.

Repeating this motion several times before and after you run will strengthen and stretch your Achilles tendon, meaning there's less of a chance you'll pull the tendon and get tendonitis.