1:One of the issues I ran across was the breakdown of running velocities and the interpretation of high speeds.
For example, one differentiation was measuring total time spent above 20kph. What does that mean?
If the accel to that speed is over a very short dist, it requires maximal acceleration but beyond 40m the average may be intermediate speed. You need an average burst distance and you need to know their starting velocity to qualify intensity. How fast were they going when they started the burst?
Examples for top sprinters (no R/T):
0-30 avr 29.67kph
0-40 avr 31.85kph
0-50 avr 33.58kph
0-60 avr 34.95kph
From any motion at all these speeds would be much higher.
I agree with point 3 but there are many authors of this situation.
In-fighting and positioning by coaches and medical personnel are a big issues.