About 15 to 20 minutes after you eat it, however, ice cream has the opposite effect.
“This is because the parts of the body that are in contact with the ice cream are physically cooled by the contact as heat is transferred to the ice cream,” says Josephine Connolly-Schoonen, a registered dietitian and professor of family medicine at Stony Brook University Medical Center. “But then, as the digestive process kicks in, body temperature increases as the body works to digest and absorb the nutrients in the ice cream, as well as to store the calories.”
“The body will physiologically respond to energy (i.e., heat) loss by increasing blood flow to the 'cool' region and bring the temperature back up to a physiological 'body temperature (98.6 degrees),'” adds Barry G. Swanson, a professor and co-chair of Food Science and Human Nutrition at Washington State University.
So, eating cold foods does not really change your overall body temperature.
The best way to cool your body is to stay hydrated. According to the Institute of Medicine of the National Academies, women should consume 91 ounces of water a day, and men need 125 ounces — a good deal more than the 64 ounces (8 cups) generally recommended. However, we get a significant portion of that from consuming food (nearly 35 percent) and liquids other than plain water.“After you eat, your body sends extra blood to the stomach and intestines to help with digestion,” says Schoonen. In fact, according to Mullin, there is actually a “pooling of blood in the digestive tract after eating.”
Therefore, there is less blood available to send to other body tissues such as muscles, and, according to Mullin, this can result in cramping.
Also, “The larger the meal, the more work your body needs to do afterwards to digest and process the nutrients,” Schoonen explains. “If you start swimming some serious laps after eating, the body would be stressed to send enough blood to both the digestive body parts and the working muscles, which also need more blood brought to them while exercising.”
This stress may affect the heart and lungs, or may cause muscle pain, since enough oxygen cannot be carried to the working muscles.
However, “Having a light meal and then a relaxing swim is not a problem,” adds Schoonen. So, eat light and chill out.Nutrients: One medium ear contains about 2.8 grams of fiber and nearly 3.5 grams of protein. Corn is also a good source of vitamin C (10.6 percent of recommended daily values). Additionally, it has thiamin (14.8 percent of recommended daily values), which helps to produce energy for the heart, muscles and nervous system.
Corn is also rich in folic acid, which is associated with a decreased risk of cardiovascular disease and can help women during pregnancy by preventing certain birth defects.
Corn has a moderate glycemic index of 56 (compared with 100 for white bread), which means it does not raise blood sugar excessively.
The nutrition breakdown is 1 medium ear, (6 3/4 to 7 1/2 inches long, 103 g): 111 calories; 1.32 g total fat; 25.86 g total carbs; 2.8 g total fiber; 3.421 g total protein.
Chef and food expert Aliza Green, author of “Field Guide to Produce” (Quirk Books, 2004), advises buying corn very soon after it's picked, because the sugars in corn convert so quickly to starch. Look for a market with high volume and quick turnover that buys local corn in season.
You should “look for a bright, green and snugly fitting husk with pale to deep gold silks that are dry, and not soggy or dark,” Green says. “Pull back enough of the husk to expose the kernels. You should see full rows of pearly rounded teeth. The rows should be evenly spaced, and the kernels should be plump and milky all the way to the tip of the ear.
“Store corn in its husk for up to four days, though it will be at its sweetest closest to when it's been picked,” Green says. “Store husked ears in plastic for one to two days in the refrigerator.”
Charles Stuart Platkin is a nutrition and public health advocate and founder of DietDetective.com.