3. Triathlon
Odds of dying: 1 in 68,515
Triathlon, one of the most physically demanding sports, involves competing in three disciplines: swimming, biking, and running, each of which carries its own risks. The death rate estimated at one in 68,515 is based on analysis of 959,214 participants out of which fourteen died, including 13 while swimming and 1 while biking. Although drowning was declared the cause of each swimming death, 7 of 9 autopsies showed that diseased had cardiovascular abnormalities. The analysis concludes that while the cardiovascular disease can be seen as contributing factor, logistical factors ( a great number of participants) and adverse environmental conditions (cold, turbulent water) also played a role in these fatalities.
