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The 
 said the body burns 
 faster when it is cold. She said your body works harder to maintain its 
, so you use up more calories by exercising in the cold. Physical 
 in cold temperatures boosts our 
, which helps us lose weight. In the cold, our metabolism slows down, so we can preserve 
 and keep warm. Another 
 of exercising in the cold is that being in natural 
 helps to reduce our stress. Many people have Seasonal Affective Disorder (S.A.D.). This is a 
 of depression caused by the short, dark days of 
.