Am I missing something because the article referenced is not increased stride rate. Its its force, flight distance, which then would be Stride length. Correct. A lot of research articles by the iaaf point to the same.
The above link is Peter’s thoughts from last year.
Look at the force plate data……Vertical forces have values and horizontal forces have values. Top speed is terminal acceleration so we will see less horizontal force at 60m than at 5 meters.
Slide 60 is paradoxical because we are seeing the highest horizontal speed with horizontal forces that are not higher. This is very much due to posture and how foot strike is relative to the hip. Just leaning 3 degrees the forces will change but the speed may drop .5 meters per second.
Another aspect to look at is COM relative to limb contacts because some athletes may appear that they are changing qualities but their mechanics may be different, yet the times remain the same.