Additionally, he won the ESPY for Best Athlete with a Disability in Men's Sports.
Nikic trained with Dan Grieb, who has completed 16 Ironman races, for four to eight hours each day for around one year.
He began exercising in 2017 with a single pushup and aimed to improve his performance 1% each day.
[11] In announcing Nikic's record-breaking feat of being the only person with Down syndrome to complete two IRONMAN competitions, the Special Olympics announced the triathlete's designation as a Special Olympics Champion Ambassador, "for the impact he's made on the organization.
He had open-heart surgery at five months old, and was not able to walk well until four years old or eat solid food until age five.