Quadruped Donkey Kicks
To do the Donkey Kick, start on your hands and knees. With your right knee bent and foot flexed, drive your right foot up and back toward the ceiling. Keep your core braced and squeeze your glutes as you kick your heel up and back. Do not let your right knee flare out as you lift. Make sure to really drive your heel up toward the ceiling.
Extend your hip as you kick back. Don’t simply swing the leg back and up or hyperextend your low back to kick up higher. You want to squeeze your glute and feel your hip extending. Hold for a second or two at the top and lower back down.