3 sets of
7 heavy dumbbell reps with a 7 second hold on 7th rep. Immediately drop the weight and perform 7 medium weight dumbbell reps with a 7 second hold on 7th rep, drop the weight and immediately perform 7 light weight dumbbell reps with a 7 second hold on 7th rep. Repeat on opposite leg. Refer to video for a better understanding of the movement. Rest 2 minutes between sets.