The brain is often described as being “like a muscle”. It’s a comparison that props up the brain training industry and keeps school children hunched over desks. We judge literacy and numeracy exercises as more beneficial for your brain than running, playing and learning on the move.
But the brain-as-muscle analogy doesn’t quite work. To build up your biceps you can’t avoid flexing them. When it comes to your brain, an oblique approach can be surprisingly effective. In particular, working your body’s muscles can actually benefit your grey matter.