Getting yourself to the gym can be expensive. From the "cheap" membership deals that turn out to be not so cheap, to the crisps you have to buy midway through the afternoon because you're starving from your morning workout, every penny adds up.
The area where you're liable to spend most money, though, is on gym kit. Back in the day, people were more than happy to wear their scrubby old T-shirt and a holey pair of tracksuit bottoms for a run on the treadmill. Now, though, everyone seems to be clad in high-end designer gym gear, which is weird, because all you're going to do is sweat all over it.