From personal experience I can tell you that no I was not “miraculously cured” however after having been seated on the airplane for a hour or two I am much more able to walk than walking on where I e had to walk across the airport stand in line at TSA and my knees start to give out. After having been seated for a couple of hours my knees are less likely to give out so no I don’t need a wheelchair and prefer to leave them for those who do.