This chair can give your core a workout whilst you sit at your desk working.
The SitTight chair was designed to help office workers dealing with back pain and improve their posture for a healthier 9-5 lifestyle.
It works by using an air bladder on the base of the chair which can be easily inflated or deflated. This forces the user to keep a stable centre of gravity, much like a fitness ball.
At the time of writing, the SitTight chair has exceeded its Kickstarter goal by nearly 300 per cent and it can be bought for $365 here.