The Effect of Running Speed on Cadence and Running Kinetics.

It measured only immediate running mechanics on a treadmill, not injury outcomes, so it cannot show whether faster running causes injury. The speeds were run in a fixed order, slowest to fastest, not randomly, so the study cannot separate the effect of speed from the effect of order. Runners wore their own shoes, and shoe style or wear was not controlled. The paper reports 19 male and 11 female participants, and the cadence subset analysis included eight runners, so subgroup findings may be underpowered. Cadence counted by an examiner was higher than treadmill cadence at each speed, so only treadmill cadence was reported. Vertical impact peak was not always discernible, and loading rate calculations depended on its estimated timing.

The authors report no conflicts of interest.

Do not conclude that faster running is safe because cadence rises. In this study, faster speed raised both cadence and ground reaction forces, and the paper did not test whether changing cadence or speed prevents injury.