Researchers came to this conclusion after analyzing data from published research that had involved the use of wearable trackers to measure the physical activity in adults who were middle-aged and older.

A recent BMJ paper gives a full account of the systematic review and meta-analysis.

The analysis also reveals that sitting for more than 9.5 hours per day is linked to a significantly higher risk of early death.

The findings largely confirm those of previous studies on links between physical activity, sedentary behavior, and longevity.

According to the researchers, most health guidelines about minimum levels of exercise have relied mainly on studies that used self-reported levels of activity.

The researchers note that their new investigation is significant because they only included those studies that measured physical activity using accelerometers. These wearable movement sensors can track the amount and intensity of activity during waking hours.

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