> I think your body has natural mechanisms to mitigate that initial discomfort. I think the main natural mechanism the body uses is endorphins.. In my experie

> I think your body has natural mechanisms to mitigate that initial discomfort. I think the main natural mechanism the body uses is endorphins.. In my experience it also benefits from training, coming on quicker at the start of a regularly strenuous lasting activity. When I started going on runs regularly I could clearly sense when the internal drug supply turned on and it became the point where I mentally marked transitioning from a short sprint to endurance mode. I've also noticed when taking people on long hikes who don't usually do such things, if we take an extended break they usually start complaining of aches and pains and are suddenly wrecked. My assumption has been this is the endorphin supply shutting off, and it's a tough hump to overcome to get flowing again now that the pain/soreness/exhaustion has become realized. I suspect folks who aren't accustomed to getting out and active at all are kind of pre-trapped in that state and don't reach the endorphins flowing mode even once before going back indoors to play vidya.