Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Place your hands on the ground with your arms extended underneath your shoulders and raise your torso and hips off the ground to create a straight line from your shoulders to your heels. Place your left foot overtop of your right heel and slightly bend your right knee while slowly pushing your right heel backwards until you feel a comfortable stretch in your right calf. Hold the position for 15-30 seconds and repeat with the opposite side.
Keep your leg straight and press the heel gently downward. Don’t bounce—hold the stretch steadily and breathe deeply.
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