A Single Leg Barbell Calf Raise is performed by setting yourself up by stepping one foot up onto a raised platform, such as a plate.
Place your working leg at the edge of the platform such that the heel drops over the edge and the toes are on the plate. Your other leg remains on the platform to provide stability and balance.
Drive the heel up so that your working leg is on its tip toes and then slowly lower the heel back down to achieve a slight calf stretch. After completing your repetitions on one side, repeat on the other leg.
To help with balance, engage your core and look straight ahead.