Difficulty of Military Training?

I've been thinking about enlisting after I graduate from high school but I'm not exactly sporty. I mean, I can handle high school PE, but I've heard military training is next level. On a scale from 'run a mile' to 'climbing Mount Everest' how hard can I expect military training to be? And is there a difference in the difficulty level between the branches? Like is Army training significantly harder/easier than Navy or Air Force training?

The intensity of military training often scales up from a "run a mile" level to possibly "marathon" level. Military training is designed to condition you both physically and mentally, to instill discipline and teamwork, and to prepare you for possible combat scenarios. It is more demanding than high school P.E. and may initially prove challenging.

However, something worth noting is that military training is also structured to gradually acclimate you, starting from basic conditioning and steadily increasing in difficulty. You won't be thrown into the deep end right away, and trainers understand that recruits come from various fitness backgrounds. For new enlistees, the regimen usually begins with basic training, often going over weeks, where they get you in shape and orient you to military life.

As for the different branches, each has its own unique training program, with varying degrees of physical and mental demand. The Army and Marine Corps often have physically intense training due to potential ground combat roles. The Air Force and Navy also have strenuous training, but it might be slightly less physically demanding as these branches have more technical and science-oriented roles. The physical standards for the Marines, for instance, are known to be quite rigorous.

But remember, when considering which branch to join, you should also take into account the types of roles and jobs you're interested in beyond just the physical difficulty of training. You might speak to a recruiter from each branch to get more insight into the specific requirements and nature of training for each.