Please choose the correct ending to complete the given sentence: Health: [header] How to stretch your back [title] Do the cat pose. [step] Get down on your knees and place your hands in front of you with your palms on the ground. Make sure that your fingers are pointed away from you.

Ending1: Move your hips forward until they are parallel to the floor. [substeps] This exercise is specifically used if you have graceful backs. Ending2: Move one hand towards the top of your head and the other hand behind your back to rest on your knee. [substeps] You may try doing the cat pose as a light stretching routine. Ending3: Then move your head down and your spine up while rounding out your back and stretching out your spine. [substeps] If you have a neck injury, speak to your doctor about whether or not this pose is appropriate. Ending4: Spread your toes so that the tops of your feet are touching. [substeps] Try to keep your spine straight when doing a cat pose.

Answer format: ending1/ending2/ending3/ending4