I have not heard any previous mention on tis board for the double dosing for kids for athletic activities. My 15 yr old daughter is non-saltwasting and very athletic. Last year she began to play hockey and I would notice the "wilt" as you also mention. She was also coming off the ice.... beet red and incredibly thirsty. It was as if I couldn't pass the water bottle fast enough. Needless to say, her dad or I were always on hand. When I asked the ped endo about this, she added florinef to her regular prednisone. My daughter felt immediately much better with the games. P.S. She also tried long distance running. Same thing. This time though along with a very reddened face, she also had stomach cramps.