Treadmill and maybe some other small stuff (2 days / week) will be just fine for me and maybe swimming (2 days / week).
A special interest I have for skiing to see how much is enough :)
it was ok for me 40min tredmill
also gcmaf.eu reported that cancer patients wh o had best results made 40min excericse daily and increased vit d3>40ng/ml
swimming was ok 3 times a week, 1hr, but i stopped swiming in june, too complicated and long times while tredmill is perfect
Thanks for links!
At the first look it seams that moderate is the word for sport.
I have to study this in more details regarding the sports that I want to do :) and if I found something interesting i will update this thread.
http://jap.physiology.org/content/59/2/426.abstract
http://www.ncbi.nlm.nih.gov/pubmed/9272775
http://www.medhelp.org/posts/Hepatitis-C/interferon-and-exercise/show/1042609
i feel tremills and swim the best for me