Like anyone else that plays hockey for a living, clearly. Sunrise has always had reasonable stamina from his youth but by training other things, he has also built up considerable strength - it comes on handily as he does not need to bother with specific training to improve general strength or anything of the like.

As far as stamina goes, he has been improving his stamina by jogging daily in spite of the circumstances around him. The cold does not seem to scare him much though he had to opt for jogging inside in colder days as the team required him to do so... they would rather their big player not end up frozen in Lethbridge or something.

But jogging has been pretty good for the mind as well, allowing Sunrise to think about other things as opposed to remembering of the sport he chose to play for a living and sometimes even hear the odd podcast here and there.