I think your doctor probably told you not to play pickle ball because quickly swinging your arm to hit the ball spikes blood pressure. BP Spikes are dangerous because the aorta is already weakened that’s why it’s at 4.7. You don’t want to enlarge it any further because once you get up past five it starts getting more dangerous( especially if you’ve had other members in your family suffer w/ an aneurysm or if you have a bicuspid valve or some other genetic predispositions that would make a 5.0 cm aneurysm ready for Preemptive surgery). If you’re careful you can stabilize it at that size (all other things being equal) The scary thing about aneurysms is there are no symptoms (typically) until it either dissects or ruptures and then your chances of surviving are very slim. I don’t write this so adamantly to alarm you, 4.7 cm is not huge but a serious thing ( please work to keep it that way))… in my opinion , Pickleball is just not worth the risk, so be careful. Enjoy your vacation and enjoy your life but please way the risks of your hobbies and athletic enjoyment.