Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to take a yoga break at work [title] Maintain correct posture. [step] Before you do any office yoga poses, especially those you can do seated in a chair, make sure you're sitting with good posture. Move to the edge of your chair so that your feet can rest flat on the floor.

Ending1: [substeps] If you have good posture, yoga probably won't be a big problem. Your spine will be perfectly straight (inside and out). Ending2: [substeps] When standing, keep your back straight and your head turned to the right. Keep your spine and your pelvic floor straight as you move from one side of your body to the other, and keep in mind that sitting with poor posture puts more stress on your lower back. Ending3: [substeps] Generally you want to sit in a stable chair rather than a chair with wheels, if at all possible. If no non-wheeled chair is available, lock or block your wheels if you can so the chair won't roll. Ending4: Fold your arms on the desk in front of you, hand bent at the elbow. Reach to your hip (not your back, for more support) until your torso is parallel to the floor and your arms are straight.

Answer format: ending1/ending2/ending3/ending4