Other factors to consider

Location

Choose a gym that's close to your home or work - if you're going to use it in the mornings or lunchtimes go for one that's close to work. Think about how you'll get there and whether it has free parking.

Peak times

Check out the gym at the time of the day when you'll normally be using it. Is it crowded? Are there queues for equipment? If you enjoy classes, are they on at convenient times?

Induction

If you're new to the gym scene, you'll need an all-round fitness and medical assessment before you start. This should include checks for high blood pressure, diabetes, arthritis or chest pains. You may also be asked what medications you are taking. The assessment will help gym staff develop a programme to meet your needs. If you have a medical condition, consult your GP before you start any physical activity.

Personal goals

A good gym should help you determine why you are joining - to improve fitness and health, lose weight, tone muscles or train for a particular event. If you set goals, you are more likely to stay motivated. Goals should be "SMART" - that's specific, measurable, achievable, realistic and set to an appropriate timeframe.

Staff

Check the staff are registered exercise professionals. If you have a medical condition, do they have specific training in exercise suitable for your needs? Are they friendly and helpful? Is there constant supervision?

Environment

The environment can make a big difference to your comfort and enjoyment, and therefore how much value you get out of the gym. Is the ambience (lights, TV, music) to your liking? What about the atmosphere - is it hot, sweaty and stuffy or airy and spacious? What are the showers and change rooms like? Do they have hair dryers and lockers? Is equipment clean and well maintained?

Clientele

Are you comfortable around other gym-goers? Will you be comfortable in shorts and a t-shirt if everyone else is wearing lycra (or vice-versa)?

Flexible membership

Joining a chain can be a good idea if you travel around the country, or if you want the option of going to a gym near your home or one near work. If you join a chain, check you won't have to pay extra to use another of its gyms. Also, pricing structures may vary between branches so check which branch is cheapest to join at.

Extras

What other facilities does the gym offer - creche, dietitian, spa, and sauna? Are they part of your membership or do you need to pay extra?