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Moving Every Half Hour Could Help Limit Effects of Sedentary Lifestyle, Says Study (theguardian.com)
An anonymous reader quotes a report from The Guardian: Moving your body at least every half an hour could help to limit the harmful effects of desk jobs and other sedentary lifestyles, research has revealed. The study found that both greater overall time spent inactive in a day, and longer periods of inactivity were linked to an increased risk of death. Writing in the journal the Annals of Internal Medicine, Diaz and colleagues from seven U.S. institutions describe how they kitted out nearly 8,000 individuals aged 45 or over from across the U.S. with activity trackers between 2009 and 2013. Each participant wore the fitness tracker for at least four days during a period of one week, with deaths of participants tracked until September 2015. The results reveal that, on average, participants were inactive for 12.3 hours of a 16 hour waking day, with each period of inactivity lasting an average of 11.4 minutes. After taking into account a host of factors including age, sex, education, smoking and high blood pressure, the team found that both the overall length of daily inactivity and the length of each bout of sedentary behavior were linked to changes in the risk of death from any cause. The associations held even among participants undertaking moderate to vigorous physical activity.
Those who were inactive for 13.2 hours a day had a risk of death 2.6 times that of those spending less than 11.5 hours a day inactive, while those whose bouts of inactivity lasted on average 12.4 minutes or more had a risk of death almost twice that of those who were inactive for an average of less than 7.7 minutes at a time. The team then looked at the interaction between the two measures of inactivity, finding the risk of death was greater for those who had both high overall levels of inactivity (12.5 hours a day or more) and long average bouts of sedentary behavior (10 minutes or more), than for those who had high levels of just one of the measures.
Those who were inactive for 13.2 hours a day had a risk of death 2.6 times that of those spending less than 11.5 hours a day inactive, while those whose bouts of inactivity lasted on average 12.4 minutes or more had a risk of death almost twice that of those who were inactive for an average of less than 7.7 minutes at a time. The team then looked at the interaction between the two measures of inactivity, finding the risk of death was greater for those who had both high overall levels of inactivity (12.5 hours a day or more) and long average bouts of sedentary behavior (10 minutes or more), than for those who had high levels of just one of the measures.
Being twice as likely to die doesn't provide a lot of meaningful information, especially when the raw percentage chance is low. Based on information linked in the study, only about 4% of the study population died over the time period of the study. The only information is that the study was of adults at least 45 years of age so although that may seem high, I'd really want to know what the age distribution is as that could be within expectations for their participants.
Regardless of that, it suggests that even if you are less active (and therefore twice as likely to die) your odds of death still aren't very high in an absolute sense.
Not being sedentary can limit the effects of being sedentary.
(sigh)
I am reminded of the Tautology club, where the first rule of the tautology club was the first rule of the tautology club.
File under 'M' for 'Manic ranting'
....at less less than 12 minute intervals. It takes me 5 minutes just to get back "into" my job after getting up for another coffee. I routinely sit for 55 minutes at a stretch, anything less, and my productivity suffers dramatically.