I heard that the legendary Martial Artist Bruce Lee was a ChaCha champion. Never confirmed it myself though. It'd be a fun fact to look for.
In a competition at the champion level, one heat (involving the Waltz, Tango, VWaltz, Foxtrot, and Quickstep) will use up the same energy and effort as when a sprinter running the 400 metres. The only difference is we are in a wool suit or high heels--and trying to look like we hadn't just run 400m.
Ballroom dance requires the endurance of a marathon runner, the strength of a high jumper, and the grace and control of a ballerina--again all of whom get to wear comfortable clothes, whereas, we get to wear wool suits.
Did I say we wear wool suits? I meant we SWEAT in wool suits.
Is this what you were looking for?