I am actively working out just thought it was weird that I started my packet 4 months ago and it had never been brought up until I asked my recruiter today if I had to take one and he said yes but thanks for the insight!No you dont, but you should be actively working out. While waiting for your ship date you may do COP(commissioning officer program), which for my group is a monthly meeting where we go through the PRT and they track our progress. Its pretty relaxed and fun to hang out with everyone.
If you need workout ideas, it was recommended to me by a recent grad to do HIITS.