Stupid things I’ve done Number 3,754 involved a mountain in Switzerland, snow, an inflatable inner tube and a cliff. It led to me damaging my lower back (and therefore taking up swimming). It flares up every so often and the best option is to go back to doing some core exercises. I should do them all the time but I get fed up of them.

Anyway, here’s a great video of a wide collection of core exercises. It hurts just looking at  them.