The Three-Way Lunge exercise works your butt, quadriceps, inner thighs, and hamstrings.
Love Your Legs Workout, Three-Way Lunge. Use the same leg to lunge throughout. First step forward into a lunge. Return to start. And out to the side, return to start. Then lunge backward to complete one rep. Switch sides and repeat. Do 2 to 3 sets, 15 to 20 reps.