The last thing on your mind while you're surrounded by all that snow is a good cool drink but you'll pay for it later if you neglect to keep up your water intake.

Always make sure you are well hydrated when you're exercising. As a rule of thumb, you should aim to drink at least two litres of water every day. (In fact the recommended level is drinking half your body weight in water a day!)

During exercise, and particularly if the activity is prolonged such as a day's skiing, drink approximately half a cup of water every 15 minutes.

Carry a small bottle of water with you at all times, even when you're not exercising and keep yourself topped up!

Chris Williams is an exercise physiologist and former Great Britain triathlete - check out his columns in www.Channelhealth.tv for more information.