While on the Water Kayaking is a physically demanding sport, and as such there is some risk of injury, and you need to be aware of your body's needs. Shoulder dislocations and subluxions, while not common, are injuries associated with kayaking. By remembering not to extend your arms above your head when bracing, you can help avoid such injuries. Thirst is not necessarily a good indication of when you need to drink. Keith Attenborough provides us with an article on hydration .
Cold water kills, and depending on the temperature, it can kill fast.
Whenever you go kayaking, you should always dress with the expectation of immersion. Be aware of water temperatures and dress for the water. Read the article in the Dec. 98 Atlantic Coastal Kayaker or at Fern's Inukshuk site . There are a few books related to hypothermia listed on the Book Reviews page. It may be tempting to go out and buy a big First Aid Kit, but remember that any equipment is useless if you don't know how to use it.