Today I was a looking at a different clause on the health and safety laminate at work while waiting for the kettle to boil, and then I realised it was the one above the one I last took notice of. Back at home, I measured my height against a mark I scored in a door about 2 years ago, before I started cycle commuting every day, and sure enough, I've been stretched about 5 - 10 millimetres due to cycle commuting. I think it's a combination of these things: -Having a angular centre point of your rear on a saddle means that *both* your legs and upper body get stretched, unlike something like running which just compresses you linearly and vertically. -Cycling first thing in the morning means that you get on the bike while your skeleton is the longest, which is proven to be when you're asleep -Sitting down at work all today, and suddenly cycling home has some sort of spring action. Has anyone *really radically* stretched since commuting, to the extent that their parents notice for example?