This is how you do it
Start in a standing position with a support for your hands.
1. You can use any piece of furniture that’s about waist level or a pole for balance and stability.
Brace and flex your glutes and legs to extend your right leg behind your body.
1.Your torso should remain upright and the knee should be locked so your range of motion will be short.
Return the right leg to the starting position.
Flex your glutes and legs to extend your left leg behind your body.
Return the left leg to the starting position.
1. A variation would be extending the leg sideways or laterally from the body.
Alternate legs after the desired number of repetitions.
Lying Back Extension