Sit on the floor with your upper back against a bench
Bend your knees and place your feet flat on the floor
Roll a barbell over your hips or place a weight on your lap
Keep your feet about hip-width apart
Brace your core
Drive through your heels
Lift your hips until your torso is parallel to the floor
Squeeze your glutes at the top
Keep your ribs down and chin tucked
Lower your hips under control
Repeat for the desired number of reps