How to spot them: Follow the trail of discarded skipping ropes, resistance bands and free weights.

You know what mate, if you want to shed socks all over your bedroom floor, we really don’t care. Leave your towel where it drops in the bathroom – your prerogative.

But when it comes to shared equipment in a shared gym, it’s a very different matter. For chuff’s sake, put things back in the right place you slovenly bozo! There’s nothing worse than looking for a set of 6kg weights only to find one in the 10kg section and – 20 minutes later – another in the dance studio.

Actually, there is something worse. Stubbing your toe on a 6kg lump of metal some twonk has left hidden behind a Bosu ball – that’s worse.