Table 1.

Categorising extreme sport.

Descriptive components	1. Competitive or self evaluative	2. Natural environment (speed, height, depth, natural forces)	3. High risk evidenced by mortality statistics
Extreme sport
Archery	Yes	No	No
Base jumping	Yes	Yes	1:60
Basketball	Yes	Not really	No
Boxing	Yes	Some speed	1:2,200
Canoeing (white water canoeing)	Yes	Yes	1:10,000
Cycling	Yes	Not really	1:140,845
Drag racing	Yes	Yes	484 deaths 2010–2016∗
Grand prix racing	Yes	Yes	1:100
Hand gliding	Yes	Yes	1:560
Motor cycle racing	Yes	Yes	1:1000
Mountain climbing	Yes	Yes	1:750
Scuba diving	Not necessarily	Usually	1:34,400
Snow boarding	Yes	Yes	1:2.2 million
Soccer	Yes	Not really	No
Swimming	Yes	Somewhat – e.g., open water endurance	1:1 million