Fred Duncan on Instagram: "It’s easy to see a drill and assume it’s building what it looks like. But visual cues can be deceiving, especially in sprinting. The appearance of being “low” doesn’t always reflect what’s happening mechanically. Understanding why an athlete moves the way they do is far more important than forcing them into shapes that just look right. That’s exactly the type of nuance I break down inside Speed Kills, my complete resource on developing speed from the ground up. Use cod