Energy return in running shoes explained

Running has been a competitive sport for over a century, with the Boston Marathon—first held in 1897—standing as clear proof. But the phrase “energy return” has only gained attention in the last decade or so. Why is that? For decades, running shoes relied on EVA foam, which is light but not very springy. But once advanced materials like TPU, TPEE, PEBA, and A-TPU entered the scene, everything changed. Suddenly, brands started chasing the goal of 1[…]