An effective exercise for the abs. It also works back, arms and legs muscles.
Place a barbell in front of you.
The barbell plates should be able to rotate.
Bend to reach the bar and hold it tightly.
Press feet against the floor.
As you inhale, extend your body rolling forward with the bar.
Keep your legs straight.
As you exhale, pull the bar to the starting position by contracting the abs.
If this exercise is too difficult for you, start out with the starting position on your knees.
Don't bend your arms and knees as it decreases the load.
Don't touch the floor at the bottom.