Please choose the correct ending to complete the given sentence: Health: [header] How to cure bruxism [title] Do breathing exercises before bed. [step] This is an easy way to unwind before you go to sleep and reduce any feelings of stress. You can do this exercise with music on low volume in the background to create a relaxing environment.

Ending1: It can also be done by exercising with the music on. Breathing exercises include : [substeps] Deep breathing exercises, like elevating your abdomen and slowly drawing deep breaths in and out. Ending2: If there is a fan blowing or popping in the background, close your eyes. Pay attention to the rhythm of your breathing. Ending3: [substeps] Sit somewhere comfortable, with no distractions. Inhale for 3 seconds, using your diaphragm. Ending4: Don't try to keep the volume down with headphones and a fan. Aim for 20 to 30 breaths per minute.

Answer format: ending1/ending2/ending3/ending4