Surgeon Jay Harness has become a passionate advocate for the unquestionable benefits of exercise for prevention and every stage of cancer.

Exercise as a means to affect the progress of cancer can seem to have appeared out of left field in recent years, and indeed, when compared to the trajectory of nutrition, it has. That said, it is still a journey of nearly half a century, conforming to the old adage about science progressing one funeral at a time. But exercise has not faced the formidable opposition that nutrition, has insomuch as it presents comparatively little threat to the status quo of the business model around cancer. This has led to relatively rapid progress in establishing the science that demonstrates unequivocally that exercise should be a leading strategy in all cancer centres and for practically all patients. This, however, is far from the case, and it is this glaring gulf between science and practice that Dr Harness seeks to address.

• Cancer Fitness