Stand with your feet no more than shoulder width apart. Keep your abs tight, chest up and back straight, holding dumbbells (palms facing in) down by your thighs.
Squeezing shoulder blades together and in a controlled motion, raise dumbbells up until arms are slightly higher than parallel to the floor.
While maintaining the controlled motion, return to starting position for one rep.
Keep going for a total of 40 seconds, then rest for 20 seconds.
Repeat the above two exercises two more times, then take a one-minute rest.