TONY MCCONNELL / SCIENCE PHOTO LIBRARY TONY MCCONNELL / SCIENCE PHOTO LIBRARY
Obese woman, thermogram. A thermogram shows the variation in temperature on the surface of an object, measured by the long- wave infrared radiation it emits. The temperature scale is colour-coded and runs from blue (coldest) through green, yellow, orange, red and pink to white (warmest). Temperature regulation is more difficult in obese people and sweating is increased (white areas). Blood flow to the lower legs and feet is reduced because of poor blood circulation, causing them to be cooler than other parts of the body. Obesity increases the risks of developing many conditions, including heart disease, diabetes, osteoarthritis and high blood pressure.
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