Aerodynamically equivalent Covid-19 1.5m social distancing for walking&running [pdf]

In the limitations section, the authors mention that they didn't consider the effect of head wind, tail wind, and cross-wind.

Can anyone comment on the extent of this limitation in applying their findings to a real world environment? I have to imagine that on even a mildly windy day the slipstream of a runner would look significantly different.

One comment: most recreational runners don't move most of the time at a 6:40/mile pace. That's the pace you need for a 2:45 marathon. I suspect that 3.3/s or 3 meters/s (eight or nine minute miles) is closer to what most people are running.

The conclusion recommends an increase of the social distancing from 1.5m to 5-10m depending on whether that individual is walking or running. It seems the main takeaway is to avoid the particle wake behind the person.