. >> look at mielsz. >> reporter: even if it means coming face to face with a 1,000-pound grizzly bear named bart. >> what went through your mind when you saw that bear? >> if i could outrun that bear. if i can do that i can do anything. >> you can face down anybody with a -- >> foil? conquered the bear. the real bear is the fear within you. >> reporter: miles is also training to push through the pain and payne of high pressure scenarios. learning enhanced breathing techniques pioneered by world-renowned ice man wim hoff. >> i always say i don't care how good you are, i'll make you better. >> reporter: these exercises in keeping cool under pressure preparing them for freezing cold ice baths. >> you keep on going with the breathing. and we go all for five minutes. fully emerged up to here into the ice water. it's a big impact on your chemistry, but you are in control! >> my hand is starting to hurt. it's been a matter of seconds. >> absolutely. the deep breathing seems to be helping him ignore the pain signals. >> ease down on the breathing. ease down in the breathing. keep on breathing