Can sitting be bad for your health? An overview of current research
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Can sitting be bad for your health? An overview of current research
Stuart Biddle
Professor of Physical Activity & Health
School of Sport, Exercise & Health Sciences
Loughborough University
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and woman
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Establish links between behaviour& health
Measurebehaviour
InterventionsDeterminants or correlates
Translationinto
practice
Is sedentary behaviour
associated with health outcomes?
Can we help people sit less?What is sedentary
behaviour and how do we measure it?
What factors are associated with high or
low levels of sitting?
Can we ‘roll out’ behaviour
change solutions?
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Sedentary and active behaviours
SleepSedentarybehaviour
Lightmovement
ModeratePA
VigorousPA
Waking hours:Sitting, lying,
very low energy expenditure
‘Physical activity’ research
Energy ExpenditureLOW HIGH
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A big slice of the pie!
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TV
Sitting at schoolor work
Computers Socialising
Motorisedtransport
Sedentarybehaviours
Homework
Screen time
Reading; Listening to music
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Sedentary time per day: US adults by accelerometry
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20-29 30-39 40-49 50-59 60-69 70+
Hrs/day
MaleFemale
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Matthews et al: Am J Epi, 2008
NHANES N=6,329
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Weekly hours of TV viewing: UK and Scotland - MALES
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Physical activity statistics 2012, BHF
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Weekly hours of TV viewing: UK and Scotland - FEMALES
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Physical activity statistics 2012, BHF
Trends: 1. Scotland > UK 2. Females > Males
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Health outcomes of sedentary behaviour
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Is sedentary behaviour bad for you?
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Nov 21, 1953
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‘Sitting is the new smoking’
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Establish links between behaviour& health
Is sedentary behaviour
associated with health outcomes?
All-cause mortality CVD and mortality Obesity Metabolic health &
diabetes risk Mental health
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All-cause mortality: Risk ratios for sitting time for adults
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Risk of ACM
1 (Low) 2 3 4 5 (High)
Sitting
Inactive
Active
Canada Fitness Survey 1981-1993 (Katzmarzyk et al., MSSE, 2009)
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Systematic Review and Meta-Analysis
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Wilmot, et al., (2012). Diabetologia, 55(11), 2895-2905
CV mortality: HR = 1.90
Wilmot, et al., (2012). Diabetologia, 55(11), 2895-2905
CV mortality: HR = 1.90 (1.71)
Adjusted for PA: HR = 1.40
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Is waist thickness inversely relatedto TV thickness??
TV v. body fat: plausible but complex
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Sedentary behaviour and weight status in adults
there is a reasonable level of evidence to conclude that sedentary behaviour during childhood and adolescence is a strong predictor of obesity during adulthood
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Thorp, et al. (2011). Am J Prev Med, 41(2)
http://www.scivee.tv/node/32396
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Is it sitting or eating, or both?
Clear associations between sedentary behaviour (usual screen time, and often TV viewing) and:
elements of a less healthy diet including – lower fruit and vegetable consumptionhigher consumption of energy-dense snacks,
drinks and fast foodshigher total energy intake
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Pearson & Biddle (2011) Am J Prev Med, 41(2)
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Maybe we always knew this … ?
‘Writing and travel broaden your ass if not your mind, and I like to write standing up’ Ernest Hemingway
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Diabetes: HR=2.12Controlling for PA=2.47
Wilmot, et al., (2012). Diabetologia, 55(11), 2895-2905
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Scottish Health Survey data (Hamer et al., Am J Prev Med 2010)
MCS: mental function
GHQ: psych distress
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Can sitting be bad for your health? An overview of current research
Stuart Biddle
Email: [email protected]
Twitter: @stuart_biddle