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Stride Frequency vs Stride Length: Which One to Change?
Runners Connect reviewed multiple studies and found that runners mainly speed up by increasing stride length, while raising stride frequency mainly lowers knee and hip loading. Research shows a 10% faster step rate cuts peak kneecap force by 14%, while a step rate 10% below natural rhythm raises hip, knee, and ankle loads; a 2016 study of 249 female runners found those above the loading-rate cutoff had 2.72 times the odds of a diagnosed injury.
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