Hi Cyclo, I am a runner. My running program pre bc was usually about building to a marathon so the training was long & intense. Post treatment I was able to get back to running but about 4 months in I felt I was not improving or able to do what I did before ie the length & intensity. I ended up going to an excercise physiologist. I basically needed an 'all of body overhaul' to get me back to 'me'. It's been a huge help. I still don't have all of my speed back & still do feel different but I'm now able to train for the Berlin marathon in Sept. X Jane