This is a move I'm familiar with, but it still burns!
The All Fours targets your glutes and legs, and is a great butt lifting routine.
Remember to keep your core tight and to focus on making your legs work rather than your arms or abs.
The video is a really helpful video, and I also attached pictures and great directions for this move!
"Start on all fours with knees placed directly under the hips, elbows below the shoulders; legs should be touching. Round the back up toward the ceiling and pull abs away from the floor.
From there, lift one leg from the ground, keeping it at a 90-degree angle, and point toes up at the ceiling. Make tiny pulses upward for 15-20 repetitions. For more of a challenge, flex the lifted foot and pulse up with the energy in your heel 15-20 more reps.
If you still want more burn, extend your leg and tuck your hips, rounding the back out once again; extend one leg out and move up in a tiny pulsing movement. Complete 15-20 reps here. (Make sure you tuck your hips with every lift to increase difficulty.) More moves in this position: make circles with your lifted toes or flex the heel."