photo via acefitness.org
I have come to love sprints as an excellent form of training for speed, conditioning, and flexibility. Long gone are the days of thinking I need to run a great distance to get a seriously toned lower body, it’s actually quite the opposite. Distance running works slow twitch (type I) muscle fibers while sprinting works fast twitch (type II) muscle fibers which are responsible for enhancing muscle definition. If you want to torch some serious calories with some high intensity interval training (HIIT) and get well-defined lean muscle, read on because sprints should be an integral part of your workout. The benefits of speed training along with a great starter workout can be found here on the ACE fitness website.