Bulgarian split squats are a type of single-leg squat that primarily work the muscles of the legs, including the quads, hamstrings, glutes, and calves. They are a great exercise for building muscle and strength in the lower body, and can help prevent muscle imbalances, improve coordination and balance, and train positional awareness and control of the knee. Additionally, the Bulgarian split squat can be a good option for those with lower back problems, as it largely removes the lower back from the equation, putting the emphasis on the legs. The exercise can be performed with bodyweight only or holding a dumbbell in each hand instead of a barbell across your shoulders, which takes some load off your lower back but doesnt change the muscles worked in the exercise.