Stand in a staggered lunge, left foot a full stride in front of right, feet hip-width apart, toes pointing straight ahead; place hands on hips. Bend left knee so it's in line with left ankle; keep right leg straight, foot flat.
Press hips gently forward, feeling stretch in right calf while keeping right heel on ground (shown). Release, then repeat, with right knee (back leg) bent to stretch underlying calf muscle. Repeat for all reps, then switch legs and repeat both stretches on other leg.