I think
this article makes sense in regards to cadence:
"But there’s a very big difference between saying “Some runners might benefit from increasing their cadence” and “All runners, regardless of what speed they’re running at, should take at least 180 steps per minute.”
That acknowledgment of individual variability is probably the most important message to emerge from Burns’s data, and should serve as a caution against trying to impose general rules on your running form. Burns’s grand overall model tried to predict each runner’s cadence based on every piece of data available—speed, height, weight, age, experience, and so on. Altogether, those factors were able to explain about 50 percent of the cadence variation between runners. The rest, in this study at least, was unmeasurable. “That was intellectually and romantically satisfying,” Burns says. “We can explain half with science, but the other half is unique to you.”"
I looked at my data going back a couple of years and I have only had 5 runs in which my cadence was over 180, all shorter races.