High amounts of sedentary behaviour have been associated with increased risks of several chronic conditions and mortality.
However, it is unclear whether physical activity attenuates or even eliminates the detrimental effects of prolonged sitting. We examined the associations of sedentary behaviour and physical activity with all-cause mortality.
High levels of moderate intensity physical activity (ie, about 60–75 min per day) seem to eliminate the increased risk of death associated with high sitting time.
However, this high activity level attenuates, but does not eliminate the increased risk associated with high TV-viewing time.
These results provide further evidence on the benefits of physical activity, particularly in societies where increasing numbers of people have to sit for long hours for work and may also inform future public health recommendations.
The article above is part of a Lancet Series:
Physical Activity 2016: Progress and Challenges The Lancet Published: July 27, 2016
The Series encourages policy makers to take physical activity more seriously and to provide sufficient capacity and funding to implement national policies.
Without a rapid increase in action, the WHO target of a 10% reduction in physical inactivity by 2025 will not be reached.
We must continue to strive towards the longer term goal: the integration of physical activity into our daily lives.
In 2012, The Lancet published its first Series on physical activity, which concluded that physical inactivity is as important a modifiable risk factor for chronic diseases as obesity and tobacco.
Four years later, the second Series presents an update of the field, including progress in epidemiological research, global surveillance, intervention strategies, and policy actions.
The papers will also feature the largest harmonised meta-analysis on the joint health effects of sedentary behaviour and physical activity, and the first global estimate of the economic burden of physical inactivity.
Physical activity—time to take it seriously and regularly
Pamela Das, Richard Horton
Update on the global pandemic of physical inactivity
Lars Bo Andersen, Jorge Mota, Loretta Di Pietro
Does physical activity attenuate, or even eliminate, the detrimental association of sitting time with mortality? A harmonised meta-analysis of data from more than 1 million men and women
Ulf Ekelund, Jostein Steene-Johannessen, Wendy J Brown, Morten Wang Fagerland, Neville Owen, Kenneth E Powell, Adrian Bauman, I-Min Lee, Lancet Physical Activity Series 2 Executive Committe, Lancet Sedentary Behaviour Working Group
The economic burden of physical inactivity: a global analysis of major non-communicable diseases
Ding Ding, Kenny D Lawson, Tracy L Kolbe-Alexander, Eric A Finkelstein, Peter T Katzmarzyk, Willem van Mechelen, Michael Pratt, Lancet Physical Activity Series 2 Executive Committee