This 10-Minute Abs and Butt Workout Will Leave You the Best Kind of Sore

This core and butt exercise is pretty advanced; keep an eye on your form and if you find it to be too difficult, try the modification. (You can also work on holding a bear plank to get better at this move.)

• Start on your hands and knees, shoulders over wrists and hips over knees with a flat back. Engage your core to lift your knees just slightly off the floor. This is your starting position.
• Continuing to hover off the floor, kick your right leg back and up as if you could stamp the bottom of your foot on the ceiling. Keep the right foot flexed and knee bent at a 90-degree angle, and avoid arching your back. Activate and squeeze your glutes as you kick.
• Lower your right leg with control to return to the starting position.
• Repeat with your left leg. Remember to keep your stationary knee off the floor throughout the move.
• That's one rep. Repeat for 30 seconds.