Place both hands and arms flat on the table.
Make sure that your elbows are on the table.
A tip: It helps if you perform this exercise with both hands.
Look at the unaffected hand and raise both hands as far as possible off the table, keeping the forearms on the table.
Lower your hands back down to the table and repeat this movement.
Take the affected palm in the other hand and lift your hand of the table.
Mentally perform the exercise without support of the unaffected hand!
Note: Don't grasp your fingers to pull back as this can damage your muscles.