

The farthest distance static cycling underwater (apnea) is 855 m (2,805 ft 1 in) and was achieved by Homar Leuci (Italy) on the set of 'Lo Show dei Record' in Milan, Italy, on 25 June 2014.
Homar completed the 855 m underwater in one breath and without the use of breathing equipment.
Read more: Underwater cyclist travels 855m on static bike in one breath - Guinness World Records Italian Show