A correr se ha dicho, además de ser un muy buen ejercicio es totalmente gratis.
5 Stretches That Will Make You a Faster Runner
5 STRETCHES THAT WILL MAKE YOU A FASTER RUNNER. Whether you're a newbie runner who has just strapped on her brand-new sneaks or a seasoned, PR-ing pro, there's always room to get a little bit faster, right? We nabbed an exclusive performance-boosting routine designed specifically to improve flexibility, strength and speed.