4 . There are many benefits to exercising in the cold. You use more energy in winter, which equals to burning more calories (卡路里). And as you’re burning more energy, you sleep better at night. Regular exercise is also one of the best ways to improve your immune system and prevent you from wintertime colds and other illnesses.     1    .

•Do warm-up exercise. It is important at any time, especially during the colder months     2     and the joints (关节) take a little bit longer to warm up properly.

•Stretch (伸展) your body. It’s particularly important in the winter months when it’s easier to cramp (抽筋) up or pull a cold muscle.     3    .

•     4    . It’s easy to become dry during the cold months, just like in the burning summer heat, so carry a water bottle with you and drink plenty of water after you work out on the playground. Most people forget the importance of water after their workout during the colder months.

•Avoid catching a cold. Whenever exercise is stopped or paused for any longer than a couple of minutes, take off any wet clothes as soon as possible.     5     and then put on a jacket and sport pants to avoid getting a cold.