Hello Ward~Minter how are you?
I agree running in boots was no fun, however, guess what? It's now been banned, too many soldiers (crap hats) were going down with knee problems due to the new style boots in the late '80s. our friends in the RAMC disagreed,and put up one hell of a protest, but to no avail, the politics of the day said all Armed Forces were to run/jog in trainers unless in operational areas.
To answer Misky's Q look at Wardy's link, that should answer your querie