Deficit Bulgarian Split Squat . The deficit Bulgarian split squat is a great way to train your #quads and #glutes with the additional benefit of increasing single-leg stability and flexibility throughout a larger range of motion. . Holding two Dumbbells, position your non-working foot on the bench in a rear lunge position with your shoelaces facing downwards. . The majority of the weight should be kept over the front foot (around 80%), with the additional weight on the rear foot (around 20%). .