Please choose the correct ending to complete the given sentence: Health: [header] How to relieve chronic back pain naturally [title] Choose the right mattress. [step] You may not realize it, but on average, people spend about a third of their lives lying in bed. Therefore, choosing the right mattress plays an important role in managing back pain.

Ending1: Therefore, you should pick a mattress that fits your needs and your lifestyle. [substeps] The ideal mattress should be put in the right, relatively flat place. Ending2: Start by choosing a mattress that allows you to transport yourself comfortably. [substeps] If you feel like you can do well without a mattress, then try sleeping on your back. Ending3: [substeps] You know your body and back best. Though you should choose a mattress based on personal preference, try staying away from soft mattresses. Ending4: [substeps] Standard mattresses can provide excellent support for an entire torso-including your back. If you are overweight, you may want to ramp up the load to avoid popping issues when you sleep.

Answer format: ending1/ending2/ending3/ending4