Interesting.. I feel like I&#x27;ve definitely injured myself from not warming up enough. I actually don&#x27;t even see how you can sprint at 100% when you are cold.<p>That&#x27;s not to say I don&#x27;t believe but that I wonder if there is something more nuanced which explains the differences in our experiences.<p>If you don&#x27;t mind me asking, what kinds of sprinting do you do and how fast&#x2F;fit&#x2F;flexible are you?<p>Your evolutionary point makes sense but for example, my cats do stretch whenever they wake up. I imagine it&#x27;s not necessary for them to stretch before moving but by stretching every time they remain very flexible. Kids for example don&#x27;t really need to warm up and seem to have no trouble running right away, but they also are way more flexible than adults typically are so I wonder if that has something to do with it..