Анна Логашова (Anna Logashova) from the Russian version of the Physical 100 show, титаны (The Titans).
She holds up the ice cube for 1 hour (she could do more but intentionally drops it), while other male and female competitors, who are all professional athletes and some Olympic or world/European championship winners, could only last 3 minutes to 39 minutes.
She is professional aerial gymnast, and a world champion on the air ring.
1:02:50 - 1:17:00
https://youtube.com/watch?v=G95qKLfl14M