The largest group of carol singers consisted of 15, 111 participants and was achieved by the Hong Myung-bo Foundation (South Korea) during the Hong Myung-bo Charity Soccer Game in Seoul, South Korea, on 25 December 2010.
For the HIT group, each of the six sessions consisted of cycling all out for six seconds, resting for one minute, and then repeating the sprint a total of 10 times.