Lie on your back face up on the ground with arms to your sides. Keep knees bent, hip-width apart and heels on the ground, toes flexed up. Brace your abs and lift hips off the ground until knees, hips, and shoulders are in a straight line. Keep your weight on your heels. Hold 2 – 3 seconds, then return to the start position. Do as many as you can for 40 seconds with good form.
Image credits: Glute Bridge