When it's cold outside, don't freeze your fitness routine

" Drink up: "If you're going to some of these peaks that are 8,000 or 12,000 feet high, altitude sickness can cause terrific headaches. You have to stop and drink plenty of water continuously to adjust." You also need to know when to take a break, he says. "Sometimes you just have to come in out of the cold and warm up." "

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