This unlikely combination of sports involves brains and brawn.
Competitors play 11 alternating rounds of chess and boxing for 3 minutes each.
This little known sport has fans in Germany, India, Russia and the UK.
6. Hotdog eating contest
One of the more prominent forms of competitive eating; the rules involve participants trying to eat as many hot dogs as they can in a ten minute period.
The sport began in US county fairs and has gained recognition due to Nathan’s Hotdog Eating Contest, held annually on the 4th of July.
The sport has spawned a huge industry and enjoys popularity in the US, Canada, and Japan.