Set up in an angled plank position on the wall, then raise on leg to the wall acceleration / A march position. Find engagement through the whole posterior chain on the legs that's on the ground -- feel the connection from glute keeping your hip extended, down the hamstring, into the calf and wrapping to the arch, ball of your foot, and your big toe. Perform calf raises there, being mindful to keep the plank position. Increase the intensity of the core work and difficulty to keep the hip extended by angling your torso lower (but only as far as your footwear will allow!)