Standing with a braced core and flat back, holding a pair of dumbbells in each hand. Position your feet to be at hip width. Beginning with the right foot, step behind and across your left foot, bend at the knee and lower towards the ground with control (but do not touch the ground). The left knee should simultaneously bend and drop it towards the ground. Inhale as you do this. Stop when the front right knee is parallel with the ground. Push off the ground with your right foot and return to the starting position, exhaling as you do so. Keep alternating legs each rep for the required amount of time (or reps).