Dr. Ben Moxness | Jump Training & Athletic Development on Instagram: "As we sprint faster, our contact length (how far COM travels during ground contact) increases up to a certain point, while our contact time decreases. But how can we increase contact length while decreasing contact time? The answer is system stiffness. The easiest way to picture the basic science of sprinting is like a spring (but instead of the tissues “compressing” and releasing energy, they stretch). Stiffer springs need le