Bill, for sprinters, "power walkers" (fast walkers), and even for slow walkers (less than 1 m/s), m/s is best for measurements of human speeds.
Distances, in meters, and times in seconds are both easy for lay persons to measure and are, in fact, entirely appropriate for measuring human speeds; based on acquired "feelings" for distance and time in SI. Admittedly, for multiple kilometer walkers and runners, there is more difficulty in measuring the greater distances by tapes. But even great distances are easily measured in recent days by inexpensive GPS devices. For human speeds, minutes and hours are "clutter" as I previously asseted. Gene.
