Please choose the correct ending to complete the given sentence: Health: [header] How to manage chronic pain at school [title] Get up and stretch. [step] If you find sitting down for long periods of time increases your pain, try to take 5-10 minute rest breaks during the school day. This will help prevent your muscles from stiffening, and hopefully reduce your pain.

Ending1: [substeps] If it's cold outside, don't sit in a desk. Open the windows and try to breathe some fresh air. Ending2: [substeps] Ask to leave and walk down the corridor for a few minutes during a lesson if you feel uncomfortable sitting and you are finding it hard to focus. This will enable you to regain your focus, and lower your pain, so it is easier for you to cope. Ending3: [substeps] To stretch your hand, reach across to a wall or open a window. Alternatively, you can kneel on the ground. Ending4: [substeps] No one likes a break in their day, especially if they have physical issues, such as arthritis. You can apply table salt to take a break and encourage your muscles to contract throughout the day.

Answer format: ending1/ending2/ending3/ending4