This from
http://www.moneysavingexpert.com
What to watch for when joining a gym
The major flaw when joining gyms is the contract length. Sign up and you're often expected to pay for the whole year, even if you stop going. This is much more expensive than it seems, for example a club with a �100 joining fee and then �45 a month is �640 over the year. And if you think you can just stop paying, think again, they often use debt collectors and impact your credit score. Ask these questions�
How long is the contract term? Is a shorter option available?
Will I be able to postpone the contract for a period if I get injured?
Can I shift the contract to another gym in your chain if I move house?
Is there a cooling off period, in case I change my mind?
Of the major gyms, LA Fitness and Esporta are 12 month minimum contracts, yet shorter contracts are sometimes possible at David Lloyd, Cannons, Virgin Active and Fitness First. The shorter contracts may be more expensive, but if you're new to gyms, it can be worth paying a little more for a few months, until you're sure you'll continue. For further things to check, there's a useful publication by the Office of Fair Trading