"True, some people can recuperate more quickly – it will depend on the fitness level you had before your injury or illness. Those who were in better shape may find they are able to bounce back more easily". -
Double-eeek. I haven't swum since winter.
"You will want to begin by simply walking whenever you can. This sounds like a simple task, but walking is the most basic form of exercise there is – and it can be a great starting point after a long illness. See how far you can walk at a time, then try to go farther the next day, and the next day, etc" - MWNN is wise Padawan, obey him you must.