Key points from article :
Physical activity assessed by questionnaire or wearing a device.
Categorised jobs into sedentary, low, moderate and high activity.
High activity workers 18% more likely to die during study then low level.
No significant difference in women.
Non-significant difference in high versus sedentary work in men.
Meta-study of more than 190,000 participants.
Followed for around 20 years – 19% of them died during this period.
The study was published in the British Journal of Sports Medicine.
