Back in the late eighties teams had begun testing their riders and analysing the figures. Sean Kelly was at the height of his career and winning more of the biggest races than any of his contemporaries. He was the greatest cyclist in the World at the time and during one test session the coaches were perplexed. They asked how he could be winning so much when his figures did not correspond to such results. Kelly sat back and said ‘ that machine measures power, heart rate, Vo2 max and all that, but what it doesn’t measure is how much pain you can suffer ‘. da worldwidecyclesblog via flandriacafé.