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Sitting for More Than 13 Hours a Day May Sabotage the Benefits of Exercise

The following article, written by Gretchen Reynolds, was originally posted by the New York Times on April 10, 2019. Sitting for most of the day could make us resistant to the usual metabolic benefits of exercise, according to a small but worrying new study. The findings, in the Journal of Applied Physiology, suggest that inactivity may alter our bodies in ways that are not just unhealthy on their own but also blunt the healthfulness of exercise. We know, of course, that physical activity is good for us and being sedentary, for the most part, is not. Regular exercise reduces the risk of heart disease, Type 2 diabetes and many other chronic conditions. Even a single workout can improve our metabolisms, studies show, so that we burn fat more efficiently after meals and keep our blood sugar and insulin levels steady. Inactivity, meanwhile, has almost the opposite physiological effects. People who spend most of their waking hours sitting face heightened risks for many chronic diseases. They often also experience metabolic problems that raise the risk of diabetes and heart disease, including insulin resistance, poor blood sugar control and high levels of triglycerides, the fatty acids from food that linger in the blood…

Policies relating to occupational sedentary behaviour?

Your workplace is likely to have policies regarding leave, fire safety, employment conditions, etc. etc. but what about sedentary work? Dr Pieter Coenen led a qualitative review of existing national and international occupational safety and health policies relating to occupational sedentary behaviour. He concluded that although there were no occupational authority policies that focused specifically on sedentary behaviour, there were a relevant aspects of existing policies that could be modified to address occupational sedentary behaviour. Do you have a policy addressing occupational sitting in your workplace? Please share your story with us.

Feeling foggy? It might be time to get up…

The following article was published in The Conversation on July 27th, 2017. Could too much sitting be bad for our brains? Sitting affects our glucose levels, which affects our brain. Unsplash/Andrew Branch, CC BY-SA Michael Wheeler, University of Western Australia; Daniel Green, University of Western Australia; David Dunstan, Baker Heart and Diabetes Institute, and Paul Gardiner, The University of Queensland In many aspects of life where we need to use our brain power, we also tend to sit down: at school, at work, sitting exams or concentrating on a crossword. In a new paper, we explore how prolonged sitting may affect the brain’s fuel supply and have a negative impact on brain health. The brain is a glucose hungry organ. It weighs about 2% of body mass but demands about 20% of our resting energy requirements, which is mostly in the form of glucose, the primary brain fuel. If this energy supply is disrupted it can impair and even damage brain cells. Therefore, the availability of glucose to brain cells may have implications for brain health. Exposure of the brain to both high glucose levels and low glucose levels can increase the risk of developing dementia. Also, switching between a…

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