Why 3 Minutes Can't Predict 3 Hours

Sub-3 marathon training is full of tests that promise to predict your finish time. The most famous of them never asks you to run for more than three minutes without stopping. Ten times 800 meters. Three minutes a rep, three minutes jogging, and you are told that is your marathon. This video shows why the arithmetic behind that cannot work – and gives you the two sessions I use instead, both at the same pace, both answering a question a three-minute rep cannot reach. If you want me to look a...