Thank you for volunteering your service. PT = Physical Training on the official books. After a relatively easy Basic Training in the U.S. Air Force, I was assigned to combat ready training with the U.S. Marines. There P.T. = Personal Torture. I am proud to have survived it, and would do it over again, if I was that age again. The physical end of the training is an essential ingrediant to the mental preparedness needed in high pressure situations, whether they be combat or natural disaster.