I am currently still using the office chair I bought for uni in 2002. I have recently been told I have a twisted spine which isn't helped by my bad posture. Luckily my ailment can be fixed with some work by me and the osteopath. Can someone recommend a decent desk chair for good lower back support? I don't have any real budget just a desire to get back on my MTB ASAP as currently been banned from riding 

