Long Sitting time at one place leads to Early Death

Long Sitting time at one place leads to Early Death

No matter how much you exercise, sitting for excessively long periods of time is a risk factor for early death, a new study published Monday in Annals of Internal Medicine found. In addition to it, the new research says that not only the total length of the time one spends in sitting is unsafe, but also the duration of continue sitting at single place without break can cause the sever problems. As your total sitting time increases, so does your risk of an early death. Earlier studies that have reported a link between sitting and an early death have relied on people telling researchers how long they sat in a day.

"We think these findings suggest that it is simply not enough to be active or move at just one specific time of the day, that is, exercise", said lead study author Keith Diaz of the Center for Behavioural Cardiovascular Health at Columbia University Medical Center in NY.

Exercise guidelines are precise, he explained.

Like many of us, executive assistant Meghan Hampsey spends way too many hours sitting behind a desk. "Even if you exercise, you still should be mindful of taking breaks and be moving throughout the day, because exercise is not enough to overcome the risks of sitting, and sitting in long bouts".

The researchers studied nearly 8000 Americans aged 45 and over to examine the relationship between sedentary behaviour and death for any reason (what researchers call "all-cause mortality").

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"The REGARDS study was originally created to examine why blacks (and particularly blacks in the Southern US) have a greater risk for stroke than whites", said Diaz. The researchers used hip-mounted activity monitors to objectively measure inactivity during waking time over a period of seven days in 7,985 black and white adults over age 45. The team found that 340 participants had died. The higher average in his own study is likely "due to the fact we studied a middle- and older-aged population", Diaz wrote.

Results showed that regardless of physical activity level, sedentary time did not predict mortality for participants with a frailty index score of no more than 0.1, indicating low levels of frailty (HR = 0.90; 95% CI, 0.70-1.15).

Sitting more than 30 minutes at a stretch increases one's chances of dying. And the same was true for longer sitting stretches. The study has not designed the experiment to prove how sitting time directly causes premature death and this is a limitation of this study. "To give you a specific number, those who sat for more than 13 hours per day had a 2-fold (or 200%) greater risk of death compared to those who sat for less than about 11 hours per day". He also referenced adding sedentary bouts into the analysis, noting that "this study was able to look at how bout duration also is related to mortality, which is a novel analysis". The researchers also found that participants who kept most of their sitting bouts to less than 30 minutes had the lowest risk of death.

Dr. David Alter, head of cardiovascular and metabolic research for the University Health Network-Toronto Rehabilitation Institute in Canada, said, "The lack of activity in our muscles affects our ability to metabolize our sugars efficiently". "The longer the better, the more intense the better", said Diaz.

Arguably, he said, the study's most important contribution involved disentangling two sedentary behaviors: total daily sedentary time and uninterrupted sedentary bout duration.

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