lower back curl

How to do this exercise

1. Step:1 Lie flat on your stomach with your legs extended and your arms by your sides.
2. Step:2 Engage your glutes and hamstrings, and slowly lift your upper body off the ground, curling your back upwards.
3. Step:3 Pause for a moment at the top, then slowly lower your upper body back down to the starting position.
4. Step:4 Repeat for the desired number of repetitions.