My doctor tells me not to go outside when it is really hot, because it can aggravate my heart condition. I like to work in my garden and be outside in the summertime.
Perspiration is one of nature's ways of helping the body rid itself of extra heat.
Older adults perspire less than younger persons and also do not feel as thirsty, so they are much more likely to get dehydrated and suffer from hyperthermia, which is severe overheating of the body. Another way the body cools off is by increasing the flow of blood to the skin, so heat can travel from the center of the body to the outer surface and radiate into the environment. This increased circulation puts extra strain on the heart. Medical conditions which affect how much blood the heart circulates through the body, such as heart failure, put people at increased risk. Medicines which limit the body's ability to sweat or cause increased loss of fluid can also increase your risk of getting too hot.