“It’s quite remarkable to see that upping the intensity of daily tasks for as little as four to five minutes a day, done in short bursts of around one minute each, is linked to an overall reduction in cancer risk by up to 18 percent, and up to 32 percent for cancer types linked to physical activity.” Professor Emmanuel Stamatakis
The study is observational, meaning it isn’t designed to directly explore cause and effect. However, the researchers say they are seeing a strong link and refer to previous early-stage trials showing that intermittent vigorous physical activity leads to rapid improvements in cardio-respiratory fitness, which may provide a possible biological explanation for reduced cancer risk. Other likely contributors include physical activity’s role in improving insulin sensitivity and chronic inflammation.
“We need to further investigate this link through robust trials, but it appears that VILPA may be a promising cost-free recommendation for lowering cancer risk in people who find structured exercise difficult or unappealing,” says Professor Stamatakis.
Professor Karen Canfell, Director of the Daffodil Centre, a joint research venture between Cancer Council NSW and the University of Sydney, said regular physical activity was an important strategy for preventing cancer, through direct physiological benefits and indirect benefits in helping to maintain a healthy weight.
“More than 1800 cancer cases diagnosed in Australia this year are likely to be the direct result of physical inactivity, while many more will be indirectly related to physical inactivity because of its association with obesity, which is also a cancer risk factor,” said Professor Canfell who was not involved in the study.
“This new study shows that the more you move at a higher intensity as part of your daily living, the lower your risk of developing cancer, especially up to the 13 types associated with physical inactivity.”
The international research team on the JAMA Oncology study includes investigators from the University of Sydney (Australia), University College London (UK), Harvard Medical School (US), University of Calgary (Canada), Maastricht University (The Netherlands), National Research Centre for the Working Environment (Denmark), The University of East Anglia (UK), Norwegian University of Science and Technology (Norway), Loughborough University (UK), and University of Adger (Norway).