So I'm pretty sure (with no evidence to back this up) that common military troops probably had a training regimen that made them fit for combat. I would make the most sense. But I wonder if the nobles who led these troops in battle-- lords, knights, generals, etc-- had to train in some way to also be able to perform well in combat.
It seems it's very different learning to fence with a sword vs actually training to build up the endurance and strength necessary to fight a protracted battle. While not all nobility fought on the frontlines, for those who did, where did they get their physical conditioning from? Did they have their own "workout routines" or something similar?
Yep, Ancient Greek aristocrats worked out in (get this) gymnasia far more than their less well off citizens would have been able. But then again, the idea of training for anything was against aristocratic culture and it tends to be similar in many cultures. An noble who worked too hard at anything, from music to athletics, veers dangerously close to appearing to work.
They might have worked more because they had more time, but it was never seen as interval training or anything. Spartans are the obvious exception, the social life of an aristocratic male revolved around sporting clubs that were physically beneficial.