Superman/Bird Dog Combo

Target those glutes with this exercise called the "Superman/Bird Dog Combo" - It allows your back to flatten and stops your lower back from taking over and arching (creating a lordotic curve) so the movement comes from the hip. In order to lift your leg up you need to have full activation of your glute.
Try adding 3-4 sets of 30-50 reps per side at the end of your leg/glute session!