I don't know what point this article is trying to make, but I guess the author doesn't know much about running since he conflates sprinting and long distance running.
Long distance running is an endurance sport, sprinting is more aking to a very specific application of power/strength training. The stride isn't event the same.
Before doing any kind of data analysis, it's worth considering if your datapoints are even refering to the same thing.
Before doing any kind of data analysis, it's worth considering if your datapoints are even refering to the same thing.