Milzy
Guru
Where you push so hard you develop lactate and eventually get cramps. Keeping electrolytes replenished can avoid this and looks more impressive on Strava.I normally start out with an energy drink but if I'm out all day I top it up as I go along and end up with a strange concoction of something like energy drink, coke, orange juice and water in my bottle.
And no, I've never done a long ride at threshold either. I don't even know what it means.