Study: Sitting for more than 9 hours a day could kill you earlier
By: Team Ifairer | Posted: 23-08-2019
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Deaths fell steeply as total volume of physical activity increased up to a plateau of about 300 minutes (five hours) per day of light-intensity physical activity or about 24 minutes per day moderate intensity physical activity. At these levels the risk of death was halved compared to those engaging in little or no physical activity. "These results are fantastic. It has previously been widely assumed that more is better in terms of physical activity for health," said Tom Yates, a professor at the University of Leicester in the UK. However, this study suggests health may be optimised with just 24 minutes per day of brisk walking or other forms of moderate-intensity physical activity.
"Another important finding was that spending 9.5 hours or more each day sedentary - which essentially means sitting was associated with a statistically significant increased risk of death, with each hour more above this threshold increasing the risk of death further. "This highlights the importance of avoiding spending most of the day sitting, as well undertaking purposeful physical activity," said Yates.
The researchers point to some limitations. For example, all studies were conducted in the US and western Europe, and included adults who were at least 40 years old, so findings may not apply to other populations or to younger people. They said the large sample size and device-based measures of sedentary time and physical activity provide more precise results than previous studies.
"These findings really reinforce the saying 'Doing something is better than doing nothing'," said Charlotte Edwardson, an associate professor at the University of Leicester. "Also, a large risk reduction was seen between the least and the second least active group suggesting that incorporating some time doing physical activity, light or moderate intensity, in daily life is associated with a big health benefit," said Edwardson.
Source: indiatoday