The Single Arm Overhead Kettlebell/ Dumbbell Lunge is one of the most underrated exercises that should be added to your arsenal. This exercise works the entire posterior chain: feet, ankles, calves, hamstrings, glutes, abductors, erector spinaes, lats, shoulder girdle (traps, rhomboids, pectoralis, deltoids), triceps, forearms, and hands, just to name a few.