Position yourself under a barbell held by a squat rack. Keeping your elbows high, place your arms up and under the bar. The bar should be resting on the front of your shoulders. Core is tight. Back is flat.
Maintaining control, lift the bar up. Bend your knees forward and allow your hips to bend back as if sitting down. Pause when thighs are parallel with the floor.
Position yourself on all fours with knees underneath the hips and wrists under the shoulders.
Engage your abs and keep your spine neutral, pulling the shoulder blades towards the hips.
Lengthen the left leg until it is straight out and in line with your hips while simultaneously raising and straightening your right arm until it is parallel to the floor. Keep your head and shoulders aligned at all times.
Gently lower your arm and leg back to the starting position and alternate with the other arm and leg.
Note: Do not let your knee travel past your toes in the down position as this can cause instability and injury.