1, early to bed and early to rise. On the solstice of winter, you should go to bed early and get up early. In winter, the temperature is relatively low, and everything goes into hibernation, but you can't hide under the covers all day, you still have to go out for a walk.
2. Reduce the amount of exercise. During the winter solstice, you should reduce your exercise. For the elderly, you can sleep for a while and don't wander outside to avoid catching a cold.