I've worked 40-50 hours/week at an adjustable stand-up desk for three years now. No chair. I rarely move the desk from it's highest setting. I do get tired on a

I've worked 40-50 hours/week at an adjustable stand-up desk for three years now. No chair. I rarely move the desk from it's highest setting. I do get tired on a rare occasion and sit in a recliner with my laptop on my lap.