All Gave Some

No.  But you can do all 50 if you like. You can do 10 at a time for a single exercise and hit the 50, or you can simply do 10 Body Squats, move down to the next exercise line for 10 Walking Lunges, then to 10 Push-Ups, then 10 Sit-Ups and then back to the top again until you have completed 5 sets of 10 on each exercise.  Put together your own Strategy that fits you the best. As for RUNNING, You do what you can do. Period. We are just pleased you have taken the time to REMEMBER.

No. That is totally optional. It does however, obviously  increase the difficulty of the entire challenge, and certainly gives an added appreciation for the grit and perseverance needed to conduct operations in a difficult environment, on difficult terrain- with difficult circumstances.  (ARMOR IS ON FOR ONLY THE FIRST TWO ROUNDS)

Hmmm, I don't know? Is it....? LOL