This is an easier variation of the abs exercise to work back, arms and legs muscles.
Place a barbell in front of you.
The barbell plates should be able to rotate.
Stand on your knees.
Hold onto the bar tightly.
Place your feet on the floor firmly.
As you inhale, extend your body rolling forward with the bar.
Keep your body straight.
As you exhale, pull the bar back to the starting position by contracting the abs.
Don't bend your arms and knees as it decreases the load.
Don't touch the floor at the bottom.