Don't Dry Out
Though there isn't the heat and humidity associated with summer exercise, the cold air is often very dry and robs the body of moisture. Frigid winds increase the dehydration factor. Laskowski recommends carrying water bottles and consuming between 20 and 40 ounces per hour of exercise. Drinking during the hour or two before exercising is also a good idea. However, it is also important to replace electrolytes and avoid over-hydration.