My partner is in treatment for breast cancer. During our discussions with both her Surgeon and Oncologist we were advised that vigorous exercise reduces the risk of cancer. Engagement in lots of physical activity also reduces the likelihood of cancer returning in those who have survived the disease. The evidence is compelling and the National Cancer Institute outlines some of the research. They state that:
- adults who increase their physical activity can reduce the risk of developing colon cancer by 30-40 per cent relative to those with sedentary lifestyles;
- physically active women have a lower risk of developing breast cancer (between 20 to 80 per cent) than inactive women;
- women who are physically active have a 20 to 40 per cent reduced risk of endometrial cancer. The greatest reduction in risk is among women with the highest levels of physical activity;
- the most physically active individuals experience about a 20 per cent reduction in the risk of lung cancer;
- it is possible that men who are physically active experience a reduction in prostate cancer. Regular vigorous activity may slow the progression of prostate cancer in men 65 year of age or older.
The Economist, in the February 27th – March 4th, 2016 (Volume 418 Number 8978) on pages 70-71 state that researchers now understand why exercise protects against cancer. The answer is adrenalin. They report that a team of researchers at Copenhagen University Hospital in Denmark, lead by Pernille Hojman, using mice in their studies, found that tumours of “well-exercised mice contained more immune cells than equivalent tumours from inactive animals.”
Therefore, the evidence is compelling. We need to be much more physically active not only to reduce cancer risk but also to:
- reduce weight (and all the benefits associated with weight reduction);
- decrease the risk of cardiovascular disease;
- prevent or manage stroke, type 2 diabetes, arthritis;
- reduce depression and improve mood;
- boost energy.
With all these benefits to be had, let’s get cracking.