Hi Lily,
I too have had two STCs and was first diagnosed in 2006 and was in remission for about five years after each. I found recovery back to an active lifestyle difficult. Initially I had the common post STC symptoms like hair loss, exhaustion, dry mouth, blood clotting, lack of appetite. It took me about 6 months to get back to a good level of health and fitness but I never got back to my previous levels. I would say about 25% less than before each STC. I was very fit and active and try to keep this up but at a much reduced level than before. All I can say is that a healthy diet and a level of exercise that you can cope with seems to help….but we are all different.