The production of heat which occurs after eating is referred to as the “thermic effect” of food, or diet-induced thermogenesis. The body must expend energy to process foods you consume, leading to a temporary increase in resting metabolic rate. You can feel warmer 30 to 60 minutes after a meal, in other words, as your body generates about 10 percent more heat than it does on an empty stomach.
Evidence Analysis Library, Academy of Nutrition and Dietetics.
Thanks to year-round sporting opportunities and advances in performance clothing, you may find yourself out in the cold for a long time. Like those who deal with extreme heat and humidity, cold-weather athletes must learn to master the unique challenges of exercising in less than ideal conditions, especially if intending to compete. In cold environments, we must maintain our internal, or core, temperature.
As discussed in chapter 14, the hypothalamus acts as a thermostat to keep your body temperature at acceptable levels. Located at the base of the brain, the hypothalamus receives signals from central receptors, which sense changes in blood temperature, and from peripheral receptors, which monitor the temperature of your skin and the environment....
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