Lillian M. Beard, M.D, a Fellow of the American Academy of Pediatrics, is an associate clinical professor at the George Washington University School of Medicine and Health Sciences in Washington, D.C. She is a frequent guest expert and spokesperson on national television programs, discussing issues related to children's health. Dr. Beard practices pediatrics in Washington, D.C.

Q: I love to get my exercise with regular walks everyday. Is it unsafe to take my infant out when the temperature is at or below 32 degrees?

A: After your baby is one month old, exposing her to the cool, brisk air for short periods of time is usually safe, provided you have properly layered her clothing to trap and maintain body heat.

Many layers of light-weight cotton, cotton flannel, or synthetic blends are preferable to wool items, which may be itchy and uncomfortable. (If she is perspiring through her clothing, remove one layer.) Since heat loss occurs quickly from baby's heads, be sure to cover her head and ears with a hat. Keep her hands covered and feet warm in socks and booties. Cover her in a light-weight porous blanket to allow for greater comfort.

Using a carriage or a stroller with a hood or awning to provide another barrier of protection from direct sun and other weather elements is also a good idea. Even with an awning or hood, you should still avoid taking her out on days when there are heavy wind gusts. The risk of something blowing into her eyes is too great.

As for how long you should stay outdoors, use your best judgment. A 20-minute walk seems reasonable to allow you to have a workout without putting your baby at risk for over-exposure to the cold air. Because infant's smaller bodies don't allow them to safely withstand the extremes of atmospheric temperatures that larger, mature bodies can, you must watch for signs that your infant's had enough: Her cheeks, nose or entire face appear very red; the area around her mouth looks dusky or bluish; her eyes are tearing; she's crying excessively.

If you follow these precautions, you should have a safe and happy winter walk!