Hey guys! I’ am currently trying to get a sub-17:00 time on high school XC races for my senior season in August. My coach says that my turnover rate could be a key factor, so that is something I need to work on. However, I feel as though my fast-twitch muscles are severely underdeveloped (a 5:58 PR for 1 mile proves my point), something that may be detrimental to my performance. How can I develop my fast-twitch muscles so I can improve my turnover rate?