Ryan Collins holds world records for sheer sustained output — riding 46.6km/h for six hours to set a velodrome distance mark. What makes him useful to amateurs isn't the number, it's the three tweaks that made it possible: a position he could hold aerodynamically for six hours, fuelling dialled to the gram, and pacing that never spiked. It's a clean demonstration that ultra-distance performance is an engineering and discipline problem stacked on top of fitness, not a test of how hard you can suffer.
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Where Collins lands on the questions people ask most.