Martial Artists spend their time doing crazy stuff
Things like staff or bo spinning for conditioning and coordination improvement.
In Asia, old men are often respected if not revered.
There’s a reason for that.
A martial artist, using certain methods, can grow much more powerful as they age and only the strongest and most capable at survival can survive the numerous challenges and threats to their life into old age. A lot of it is mythology, but there are historical figures you can check to see what was going on back then.
Other countries have their cultural pride and favorite past times as well. Sometimes independent of whatever military or economic power they have.
The Japanese have a saying that hard work can be its own reward. In many ways, what individuals come up with is strange and unique, but hard work is the base of all those skills.