Jake Gyllenhaal had an intense workout regimen that included 2000 sit-ups EVERYDAY TO PREPARE FOR HIS ROLE IN SOUTHPAW.
Gyllenhaal began exercising for 6 hours a day, for six months before filming for the movie began. Workout also included 3 hours of boxing in the morning and remaining 3 hours for cardiac exercises for strengthening. His trainer had appreciated commitment and dedication.
I see it from leadership view. I can make out following qualities.
1/ Commitment to profession
2/ Role demands and role performance
3/ Following tips of master
4/ Age is timeless
5/ Discipline and dedication.

Excellence is never easily exhibited. It is a total of huge amount of efforts. Never compromises. Never excuses. Absolute performances.