Start standing with feet slightly wider than shoulder-width apart, holding a dumbbell vertically with both hands directly in front of your chest. Pull your belly button back while lifting your pelvic floor upwards to engage your core and pelvic floor.
Inhale, and looking straight ahead, bend at both the hips and knees, ensuring that your knees point toward your toes. Continue lowering into a squat until your thighs are parallel with the floor, keeping your chest tall.
Exhale and push through your heels and extend your knees to return to the starting position. That's one rep.