Why Sprints are Key to Masters

From Running Times

And fast-twitch fiber isn’t just about sprint speed. It’s a primary component (along with hip and knee range of motion) of stride length. Studies over the past 20 years have all come to the same conclusion: As we age, our stride frequency remains the same, but our stride length decreases – an average of 40% by the time we reach our 70s and 80s. Slowing the decrease in stride length through speed training simultaneously slows the decline in our distance race performance. Otherwise, we’d need almost twice the stride frequency to maintain our mile pace from age 40 to age 80.