Lower back rotational stretch

Lie on your back with your knees bent and your feet flat on the floor (A). Keep your shoulders firmly on the floor, and slowly roll your bent knees to one side (B). Hold for 5 to 10 seconds. Slowly go back to the starting position (C). Repeat on the other side (D). Repeat each stretch 2 to 3 times. Do the full routine once in the morning and once in the evening if possible.