You should be in good enough shape to walk, jog or run a mile. Push ups are also important to work on.
You can join JROTC.
Yes,
To be physically fit and be a descendant of a Spartan citizen.
no
No, you must be physically fit (wouldn't you want to be?)
To be physically fit and be a descendant of a Spartan citizen.
To join the army.
If you complete two years in any branch of JROTC, you will be eligible for Advanced Promotion to E-2.
Yes. JROTC has no effect what so ever on what branch you join when you get to College ROTC than it might dictate what branch you join but only if you are going to a military academy like the naval academy or westpoint.
Yes it either moticates them to join the military, go to college and join the rotc, or just graduate.
Of course you can. For joining service you need to be physically and mentally fit.
Unfortunately no, unless you have retired from the military and become an Army Instructor or Senior Army Instructor, or somehow become involved by becoming a volunteer/chaperon, adults are not allowed to join JROTC as it is a student program.