Change Up Your Posture with a Stool
Standing at your desk has many benefits but we all need to give our feet a break every so often. The key to achieving the best ergonomic posture is to frequently change your position throughout the day. The best position is your next one, keep moving. That means after standing for 15-30 minutes, take a load off and sit down for a spell to let your feet recover. Then repeat. With a standing desk you are sitting less and aren't trapped in your chair, thus a $1000 ergonomic chair is usually not needed.
Why pick a stool over a chair?We don't recommend that you do. We really encourage everyone to have a good chair with lumbar support so you can rest without slouching. Stools are great when used for short periods of time and can enable a perching posture, which takes off some pressure from your legs and feet while still accommodating a standing position. It's sort of like a halfway point between sitting and standing. Stools promote more active sitting and trigger more muscles to fire as you move around on the stool and keep your torso upright. So with stools you move more while seated and that's ideal. But be aware of when you start to slouch and move to a good chair when you do.
Stools take up minimal real estate, meaning if you primarily stand and sit in an ergonomic chair throughout the day, you can stow your stool without taking up much space.
To recap, we recommend the use of an ergonomic office chair with good lumbar support. A stool can work as a nice complement to a chair, but isn't necessarily a replacement because it doesn't support your back and often leads to slouching when used for long periods.
Learn more about ergonomics on the What is Ergonomics page.