Most militaries don't have a ton of desk job time, even in peace. They make bullshit tasks that need physical labor. The aim is to keep physical fitness around 75-80% for non-special forces and 90% or better for special forces. Everyone needs to be in ship shape. Shape up or ship out.

Several air forces do roughly 50% of peak sorties every week and test for peak sorties once a month or so. If it's not a habit, you can rise to the occasion.

Militaries aren't built to fight wars, but to ensure they can fight a war via muscle memory.

Ofc, if your command is particularly brilliant, the aircraft carrier you're in catches fire, but you'll have the muscle memory to rush to your station of you survive the initial contact without panicking.

Tell it to literal "Armchair" up-there. Dunno what you think you want with me.