20
Adjustable Bench
Using the equipment
Knees to chest (abdominals)
Lower the backrest and the seat completely.
Lie down flat on the bench.
Take your arms behind your head and grip the headrest for greater stability.
Lift your legs off the ground and bring them into line with your body.
Curl your knees up to your chest, then go back to the starting position.
Control the speed of movement constantly; the return speed should be slower
than the outward speed.