Gray Balance Ball Chair With Rolling Base & Backrest - Exercise Ball Chair For Office Desk

Sitting all day at a desk can be a pain – literally. This balance ball chair is a fun and active alternative to a regular office chair. It combines a sturdy, rolling base and a supportive backrest with a large 55 cm (about 21.6 inch) diameter anti-burst exercise ball as the seat. The idea is that the unstable ball forces your core muscles to engage constantly to keep you balanced, which can improve your posture, strengthen your back and abs, and might even help reduce lower back pain. It's great for dynamic sitting, where you can gently bounce or move while you work. The ball is removable, so you can use it separately for workouts or as a birthing ball. The frame is made from strong ABS and PE plastic and supports up to 160 kg (350 lbs). Assembly is simple: attach the wheels and backrest to the base, inflate the ball with the included pump, and place it on the seat. A pro tip: after first inflating it to 55 cm, let it sit for 24 hours, then let half the air out and re-inflate it to the proper size. This lets the PVC material stretch. Perfect for the office, home desk, or even for teachers in a classroom.