You DO get used to it. In fact, when I was 18 and in Basic Training in the Ozarks a five-mile hike out to the shooting range after an hour of calisthetics was nothing much. We'd sweat like hogs, the salt just pouring out and staining our shirts, pants, and even boots and as you entered the mess hall for every meal you TOOK two (buffered) salt tablets right there in front of the Sarge.