Mikko Rintasaari wrote:
...
> I don't think any tracker could tell exact > numbers from a group of several dozens, let alone also tell what kind of > gear they have and how tired they are.
...
When I'm exhausted while hill walking, I notice that I tend to drag
my feet somewhat. I guess my tracks look different from when I'm
energetic, so determining tiredness does not seem that unreasonable.