The biggest takeaway from this article is the advice that you should not adhere to the 90-90-90 sitting posture and instead raise your seat so that your knees a

The biggest takeaway from this article is the advice that you should not adhere to the 90-90-90 sitting posture and instead raise your seat so that your knees are below your hips. I've personally just tried this and it feels much more comfortable. I theorize that the 90-90-90 posture encourages bad habits where your spine shifts backwards from the center so it is no longer supporting the upper parts of your body well. By changing my sitting posture to the author's recommendation, it feels easier for my spine to stay in the center and support my upper body better.