Stillasittande och ohälsa - Statens folkhälsoinstitut

Summary
Sedentary behaviour and illness
– a literature review
introduction
Sedentary behaviours, such as tv­viewing, motorized transport and sitting at work,
are very common in modern life. Most people spend a majority of waking time
in sedentary activities, and less than one hour/day in moderate to vigorous physical
activity. Research investigating the relationship between sedentary behaviours,
disease and mortality, independent of physical activity, has grown substantially in
the last 10 years. Previous reviews have established a link between sedentary behaviours
and mortality (all­cause and cardiovascular), and most likely with the metabolic
syndrome and diabetes type 2, but with insufficient evidence for other health
outcomes. However, the rapid publication of relevant articles provides a need for an
update of the knowledge base.
aim
The aim of the present report was to compile new literature on the relationship between
sedentary behaviours, mortality and different health outcomes among adults.
This information is important in the process of developing new recommendations
for physical activity and health, and in creating new strategies for health promotion
and disease prevention.
methods
The initial search (PubMed, Medline, Cochrane; Nov 2011–Jan 2012), restricted to
papers published 1990–Jan 2012, resulted in a total of 2702 records. Only studies
that presented a measure of sedentary behaviour separate from measures of physical
activity were included. After screening the titles and abstracts, papers published
before 1997 were excluded (due to time­constraints). A total of 124 full papers were
examined. Of those, 78 studies fulfilled the inclusion criteria. Additional studies
(18) were located after reviewing reference sections of the first set of studies. The
most common reasons for exclusion was that the study did not investigate a sedentary
outcome separate from low, moderate or vigorous physical activity, or that the
study was a review.
results
96 studies were included, of which 48 were of prospective design. No interventions
aimed at reducing sedentary behaviour in adults, and investigating the health effects,
could be located. The health outcomes included all­cause­, cardiovascular­ and can­
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