Bottom line: you can't get sick without the presence of germs. However,
studies have shown that "
colder temperatures" weaken the first line of defense in your nose. This indicates a more "
sluggish" immune response and "
greater susceptibility" to infection. Good reason to strengthen and maintain your immune system. Dressing warmly still has it's benefits, however, as it will help prevent
hypothermia and
frostbite.
Myth #2: Most heat is lost through your head
Bottom line: body heat is lost from any exposed part of your body. Even if your head is being exposed to the cold, other factors will determine how much heat is lost:
- the amount of hair (bald vs abundant, think ... short vs long)
- how much energy YOU use in the cold
- exposed body surface area size (the surface area of a child's head relative to the child's body surface area is much greater than that of an adult ... proportionately, children will lose more heat through their uncovered heads)
Myth #3: Dress in layers to stay warm
Bottom line: one warm garment that is well made will do the trick. When exercising or enjoying a fun activity outdoors, however, layers provide the flexibility to adjust to different levels of activity and changes in body temperature.
Myth #4: Drinking alcohol will keep you warm
Bottom line: alcohol actually causes you to lose heat faster. Alcohol will give the perception of feeling warmer because it causes blood to rush to your skin's surface. In actuality, your blood vessels are widening causing you to lose heat faster.
Shivering is your body's signal that you are too cold. Alcohol delays the onset of shivering and reduces its duration giving a false sense of being warm.