Some people do experience increased fat levels during cold seasons. However, this is due to more emotional and psychological reasons rather than metabolic reasons. Some people experience seasonal affect disorder (SAD). SAD sets in when the days become shorter and the temperatures drop, such as is the case during the winter. Symptoms of SAD include depression, a decrease in energy levels, increased amount of sleep, and food cravings. Additionally, people may stay inside more during cold seasons. Thus, they are not as active. Accumulatively, such lifestyle changes may result in weight gain and, therefore, increased fat levels.
As previously mentioned, the increased fat levels that some people experience during colder seasons are not due to metabolic reasons. In fact, cold temperatures have shown to cause people to experience shivering thermogenesis, which increases metabolic rate.
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