Hydration is Important Even In Winter
Try to drink at least 16 – 24 ounces of water about an hour before starting activity, small amounts during, and replenish after your activity is over too. A sign of dehydration is feeling tired. Maintaining a reasonable hydration level helps add to your endurance and helps avoid dehydration-induced fatigue.
When outdoors, take a freeze resistant container of water with you so you have a supply handy. If you are skiing or snowboarding on a sunny day in warmer weather you may need more water so plan accordingly.
Many people forget to drink water when outdoors, or they don’t feel thirsty because it's·colder.·Remaining hydrated will actually help to keep your body warmer and reduce the effects of altitude.