I have no idea if you're doing it right without being able to see. With proper posture, your back will be nearly vertical, and your vertebrae stack directly on

I have no idea if you're doing it right without being able to see. With proper posture, your back will be nearly vertical, and your vertebrae stack directly on top of one another with almost no support from your muscles. You should be able to sit up in your chair and let your chair support your back (your butt should be at the back of your seat instead of slouched to the front). This is a decent illustration: https://www.vectorstock.com/royalty-free-vector/correct-spine-sitting-posture-at-computer-vector-9357307 https://www.vectorstock.com/royalty-free-vector/correct-spin...