Start standing with your feet hip-width distance apart and a lightweight dumbbell in each hand.
Lower down into a half squat stance (your knees should be at approximately a 45-degree angle) with your chest up and open and your glutes and core engaged.
Maintaining this squat position, raise your hands to chin height.
With control, throw a punch with your right hand (a jab or a cross depending on your dominant hand), fully extending the arm out and then returning it back to your chin. Repeat with the left arm.
This counts as two reps. Continue to alternate between the right and left side.
Perform this exercise for 40 seconds, then take 20 seconds of rest.