Have you ever watched the news or read a newspaper? He was tortured for 7 years as a POW during the Vietnam War.
on October 26, McCain was making his 23rd bombing mission over North Vietnam when his plane was hit by an antiaircraft missile. Forced to eject, breaking both arms and a leg in the process, he landed in a lake near Hanoi and was captured. He spent the next five and a half years as a prisoner of war (POW) at the sarcastically nicknamed "Hanoi Hilton."
Injured and ill, McCain was denied medical assistance until his captors learned that he was an admiral's son, and even then treatment was rudimentary. His father's position also prompted the North Vietnamese to offer him early release in June of 1968. McCain refused, as the U.S. Military Code of Conduct required that prisoners accept release on a first in/first out basis, and there were more than 100 POWs ahead of him. His refusal resulted in a round of torture that included knocking his teeth out, hanging him by his broken arms, and beating him almost around the clock for a week.
I rather doubt anyone expects him to be on stage dancing or in a marathon.
Just to set the record straight.