Never heard this before. Could explain why I turn the cadence I do. I'm 6'3", (190cm), and have always been a masher. I've tried to spin, but just can't get comfortable doing it. Takes the joy out of riding. On almost all my rides, from short 15 milers to metric, double-metric, and imperial centuries, my average cadence is usually in the mid 60's. No knee problems yet in almost 55 years of riding.