The threads about distance runners breaking 12 seconds, about Rudisha being able to go 10.2, Rupp being able to go sub-11, Levins going 11.5, etc. got me thinking of sprint demonstrations for you guys, since nobody seems willing to go out and put up FAT 100m times.
In the era just before the modern era, 100m sprinters used to take 46-47 strides to go 100m. Now, it is more like 44, with the great one getting down to around 41.
There is no way any of you are going to do the 100m in 41 strides, or even 44, unless you are bounding, and probably not even then. Maybe 47, since you would tend to over-stride.
Try this exercise: find a clock with a second-hand, or a timer that does seconds. Just swinging your arms, try to do 48-50 swings in 12 seconds, then in 11 seconds, then in 10 seconds, doing what you think is a sprint-like motion. Then think about the range of your swing, and look at what the range of arm swing is in a real sprinter.
Once you have done that, try to do 48-50 running-on-the-spot strides, with knee lift such that your thighs are parallel to the ground, and see how fast you can do it. Once you have got it, then think about the range of arm action you are using, and think about what sprinters are displaying.
Just an exercise to think about. I find it fun to work arm-action timing, to understand what arm speed and cycling would be required to go, for instance, 10-flat, at or slightly below my normal number of strides. Or more relevant to my ability, 11-flat.
Just something fun to try.