Pete Kiehart for The New York Times
COPENHAGEN — The squats and leg lifts were harder than they looked, and after a few sets, Alfonso Aguirre Rodriguez placed his hands on his knees and attempted to compose himself.
In November, Aguirre, a 24-year-old professional video game player from Spain, joined the five-man roster of Origen, a League of Legends team that competes in the game’s top European league. The players — all signed in late fall — were told at the time that the team might be run a bit differently from what they were accustomed to.