Set-up: Put a box or other firm, flat elevated object next to a support. Grab a dumbbell in the hand of your working leg and step onto the box. Use your off hand to grab the support for stability.
Lift: Rise up onto the balls of your feet, then descend until your heels are below parallel to your toes.
Repetitions: Perform all prescribed reps on one side, then on the other. This counts as one set.
Training Impact
Muscle Roles in standing one-leg dumbbell calf raises
Instructions and effects for the Standing One-Leg Dumbbell Calf Raises exercise 
