Should I use a stool or an office chair with a sit-stand desk?

Use a full ergonomic office chair in the seated position — sit-stand desks lower to standard desk height (28"–30") when you're seated, so a normal task chair is the right tool. Use a leaning stool or anti-fatigue mat in the standing position. Avoid the compromise of a tall stool at intermediate desk height — it creates poor posture in both seated and standing mechanics. The correct workflow is: proper seated height with a task chair, or full standing height with an anti-fatigue mat. FindOfficeFurniture.com has task chairs and anti-fatigue mats for sit-stand setups — call 888-719-4960.