Recommendations for sitting at a desk all day

[SimonMartin]

My job means I have to sit at my computer all day, 7 hours a day, 5 days a week, 46 weeks a year...
I work from home which is great as it means I can do TACFIT Commando at lunch and not get strange looks. I seem to suffer from lower back pain, which I attribute to my office chair and the way I sit on it for all that time.

However the chair broke this week and so now I need to replace it and wondered what you would recommend. I currently have a few ideas:

1. Standard chair - This is the 'safe' choice, it's "just a chair", I'm not suggesting that particular chair, but just something like it. The chair I am replacing is similar to this one and, as I said, I'm pretty sure that sitting in it for as long as I do has given me the occasional lower back pain that I get. I have seen an osteopath a few times and he also said he thought the chair was to blame.
2. Fancy chair - I quite like the look of a non-standard chair, something that supports me and allows me to move properly. The trouble here is that these kind of chairs cost more than the standard. I know that paying for an osteopath to fix problems rather than spending the money to get a better chair that meant I wouldn't need to see the osteopath is daft... but...
3. Ball Chair - If I went this route I could use the 35 hours a week as exercise time and strengthen my core muscles. It would make it hard to slouch or chill out in the chair while reading documentation though and I'm not sure I could easily transition to something as radical as this.
4. Poang This would be unusual and I would need to get a new desk to keep things at the right level. But it would be a comfy chair, all my joints would be 'open', greater than 90 degrees. Plus I already have a spare Poang.

My employer has said they would pay £100 for a chair but I cannot top that up with my own money as it blurs the question of ownership and complicates things for tax. Sadly £100 doesn't go very far, I can just about get a 'standard' chair for that money, the Ball chair is also within budget. I own a spare Poang... so really it the comes down to the question of whether I want to spend £150 - £600 of my own money on a chair that I'll use for work.

So what's your advice?
Do I go for 'comfort', or exercise? I've been doing Commando for a year now and just yesterday picked up the Tacfit Survival which I'll start soon.

[Galoot]

I am at a desk all day too.

If possible, why not just buy your own chair and bring it in?

I used to use cheap chairs with improper ergonomics and they contributed to my lower back problems.

I have a couple of Herman Miller chairs. An Aeron and one of their task chair models. Expensive, but worth it. (You're going to essentially be spending 1/3 of your day in a chair.)

http://www.hermanmiller.com/products/seating.html


Also, I take tiny breaks through the day and use some of the Intu-Flow® moves. It helps a whole lot.

Just a minute or two can make a big difference for me.

A guy named Zenkahuna (on YouTube) calls his tiny breaks during the day "Movement Snacks". I like that. lol!

[woglaka]

I don't have one, but this looks interesting. This is what I use at home, I really enjoy the comfort.

[BADKARMA]

Get up every hour on the hour and just stretch or walk around the office. It takes maybe 30 seconds to feel better.

[RonP]

One you might consider at least part time is: http://www.csnoffice.com/Sierra-Comf...D-YSZ1011.html