I like to kayak in a small narrow watercraft in my free time.
Thats sound great. Kayaking is a very healthy activity. Where do you kayak?
Whitewater kayaking
Whitewater kayaking is the sport of paddling a kayak on a moving body of water, typically a whitewater river. Whitewater kayaking can range from active, moving water, to demanding, extreme whitewater. 
History.
Paddling on rivers, lakes and oceans is as old as the Stone Age. The raft, the catamaran, the canoe and the kayak evolved depending on the needs and environment of the indigenous peoples in different parts of the world. The modern day kayak most likely originated about 8,000 years ago along
Outline of canoeing and kayaking
The following outline is provided as an overview of canoeing and kayaking:
Canoeing – recreational boating activity or paddle sport in which you kneel or sit facing forward in an open or closed-decked canoe, and propel yourself with a single-bladed paddle, under your own power.
Kayaking – use of a kayak for moving across water. It is distinguished from canoeing by the sitting position of the paddler and the number of blades on the paddle. A kayak is a boat where the