This move may seem easy, but it's a great introduction to more advanced hip-dominant movements like the barbell hip thrust. This move will also help you activate and strengthen your glutes and prevent lower-back pain.
On your mat, lie on your back with your knees bent and feet flat on the floor. Be sure to keep your feet underneath your knees, not in front. Plant your palms by each side, facing down.
Press through your heels to raise your hips up to the ceiling, tensing your abs and squeezing your butt as you do. You should be making a long diagonal line with your body, from shoulders to knees.
Hold for a few seconds, making sure your spine doesn't round and your hips don't sag. Keep your abs and butt muscles engaged.