Kneel down on one knee with your other leg behind you.
Ensure your rear knee is directly under your hip and your front knee is in line with your front heel.
Lean your chest forward onto your front leg and place your hands next to your front foot.
Straighten out the leg you are leaning on by moving your whole body back while keeping your opposite knee on the floor.
You will feel this stretch in the back of your thigh, hold as directed.