Performing the: A Step-by-Step Tutorial Single Leg Deadlift with Knee Lift
Slowly lean forward while extending your free leg straight behind you, keeping your back straight and your core engaged. Your body should form a straight line from your head to your heel.
Lower your torso until it's parallel with the floor, or as far as you can comfortably go, keeping the weight in your heel of the standing leg.
Push through your standing foot to return to the upright position, while bringing your free leg forward into a knee lift, balancing on one leg.
Repeat the movement for your desired number of repetitions, then switch legs and perform the same number of repetitions with the other leg.