Most showerheads can be set so that the water jet massages you. And most gyms supply soap, so all you need is a clean set of clothes and a towel.

To keep your feet healthy, remember to wear sandals in the showers and to dry thoroughly between your toes, because even the cleanest shower can still harbour athlete's foot fungus.

And make sure your valuables are stashed away into a locker when you're in the shower.