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Physical activity differs with sex and age

BMJ 2019; 366 doi: (Published 30 September 2019) Cite this as: BMJ 2019;366:l5694
  1. Liaquat R Johnson, professor of community medicine
  1. Department of Community Medicine, Azeezia Institute of Medical Sciences and Research, Kollam, India
  1. liaquat99{at}

Ekelund and colleagues report a non-linear dose-response between all levels of physical activity and mortality.1 Their findings support guidance on physical activity from the World Health Organization.23

But I have some concerns. First, over 70% of study participants were women. Globally, women are less physically active than men across all ages.3 So the physical activity levels obtained in this study are less likely to be …

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