Is it just me or is this apparently radical shoe advance truly surprising? Thoughts anyone? https://www.bbc.co.uk/sport/athletics/51324991 Shoes cannot generate energy because they obey the laws of physics. But they can conserve energy and release it. Which is exactly what my carbon fibre-soled cycle shoes do. And what my carbon fibre trout fly rod does but not as elegantly as my forty-year-old split cane rod. Fitting a slim, durable, carbon fibre layer into a sole is a technical achievement but it's actually quite an obvious one.