Cambridge Cardiac Rehab Educational Series: Exercise in the Cold & Hot Weather Conditions скачать в хорошем качестве

Cambridge Cardiac Rehab Educational Series: Exercise in the Cold & Hot Weather Conditions

Exercise & Hot Weather When you exercise, the working muscles in your body create heat, which is transported around the body by your blood. As your body temperature increases, the blood vessels near the skin open up and the sweat glands work harder. The body is cooled by the evaporation of sweat from the skin and the transfer of heat from the blood to the air. In this way, the body tries to maintain its ideal temperature of 37°C. Exercising in Hot Humid Weather When the air is humid (already saturated with water), it limits the amount of sweat that can evaporate; instead, sweat just rolls off of your skin. When the air is hot, it does not cool the blood close to the surface of your skin. These conditions put you at risk of becoming overheated and dehydrated. Overheating Fluid is lost from your blood when you sweat heavily while exercising in hot humid weather. When there is less fluid in the blood, your heart has to work harder to deliver blood and oxygen to exercising muscles. Signs of overheating include: an increase in heart rate excessive fatigue an increase in irregular or skipped heart beats. light-headedness or dizziness Exercise & Cold Weather: Do not exercise outdoors when the temperature is below -10°c (15°F) or when the combined air temperature and wind-chill are below this level. Can I Exercise in Cold Weather? The answer to this question depends on what the outdoor temperature is. You can exercise outdoors if the temperature is above -10°C with the wind chill factor. Check the temperature before going out for your exercise. For the most up-to-date information check the weather channel on a TV, radio or internet website. If it is too cold to exercise outdoors, there are lots of places you can exercise indoors. See a list of places where you can exercise indoors »