Start on all fours, shoulders directly over wrists and hips directly over knees.
Extend your right leg away from you, in line with your hips and perpendicular to the direction you're facing. Keep your entire right foot flat on the floor. Pull your core into your spine and lift your torso upright, placing your hands behind your head with your elbows wide. This is your starting position.
Bend forward at the hips, keeping your back flat, elbows wide, and gaze forward. Lower your torso as far as you can without rounding your upper back and shoulders.
Brace your abs and squeeze your glutes to lift your torso back to the starting position, again ensuring that your back does not round.
This counts as one rep. Repeat for 10 reps on both sides.