video1.0<iframe src="https://www.loom.com/embed/36d9fbbeeaa04ba48f20ebb8f669b562" frameborder="0" width="1662" height="1246" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>12461662Loomhttps://www.loom.com12461662https://cdn.loom.com/sessions/thumbnails/36d9fbbeeaa04ba48f20ebb8f669b562-c7f2cfee1e67d249.gif476.963In this video, I discuss the concept of critical speed in running, which serves as the boundary between stable and unstable physiological states. Critical speed, often referred to as threshold pace or 10k pace, can be maintained for 25 to 40 minutes and is defined mathematically through a speed-duration curve. I explain how we can calculate critical speed using a practical method developed by Dr. Phil Skiba, involving tests at three different durations: short, medium, and long. For example, an athlete with a critical speed of 718 per mile can expect to sustain that pace under race conditions. I encourage viewers to consider how understanding these thresholds can enhance their training and performance.