https://the5krunner.com/2017/11/21/parkrun-masterclass-mike-trees-parkrun-training-stryd-ukrunchat-usrunchat/
EMAIL from Kerry today. Parking this to read later Threshold and sustainable effort. Worth a watch, 3mins from the Gu Endurance lab, https://youtu.be/qI5qOLzO5dQ . Mentioned during outro is "my goal is to move that threshold further up the curve" . Why this is important, For an untrained/new athlete, their threshold is around 78%maxHR. For a trained athlete we might see that up around the 85-86%maxHR. While this is only a minor shift, remember that when you run/race you are operating in a 'window' between about 65%maxHR (easy/ultra-distance effort) through to that threshold. Between 65-78% for untrained, between 65-86% for trained athletes. A window of around 10% for untrained, almost 20% for trained athletes. More window is more! Imagine being able to run an ultra at 85%maxHR while operating in a near-infinite resource pool of oxygen as the primary fuel for your muscles. . How do we train to improve lactate threshold, 1) Speed work makes a differenc