For the Downward Dog, start in a standard push-up position, with your arms about shoulder width apart and your feet together. From there, pike up so that your arms and head are perfectly aligned bending only at the waste. To enhance the stretch, drive your chest towards your toes and let your weight sink into your heels. This position is the downward dog, stretching both your calves at the same time. However, we want a more unilateral stretch so bend one knee out of the downward dog, forcing your weight down into only one heel. Switch legs when instructed to ensure both calf muscles are being stretched.
This stretch focuses on the muscles of the calf. Driving your chest down towards your toes will also cause a stretch in you shoulders.