@jeremykeech: Ken Roczen is one of the best in the first few laps of a Supercross race, and a big reason why is because he trains his fast-twitch muscle fibers. Fast-twitch fibers are responsible for explosive power and quick reactions-exactly what you need for great starts and to handle the intensity of those first few laps. If you're only doing slow, heavy lifts, you're not training your body for the demands of racing. Add explosive training to your routine, and you'll notice a difference on the track. #motocross #dirtbikes #mxfitco #dirtbike #mx #promotocross #supercross #ktm #gasgas #mxlife #motocrosslife #mxlifestyle #motocrosslifestyle #2stroke #2strokelovers