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Obesity and Physical Activity studies

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bethdrysdale94's version from 2017-01-21 18:33

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Dame Sally Davies once said:77% parents of overweight children don't know their child is overweight. 50% of men and 33% of women do not know they are overweight. The population weight average is now overweight.
Guh et al (2009) saysobesity over 6.5 relative comorbidity risk of developing T2DM
Stensel et al (2009) saysgenetic influence is confirmed by twin and adoption studies, eg parents height
Church et al (2011) occupational acitvity study infopast 50 years studied, using US governmental labour statistics and national BMI from national surveys from previous years. looked at trends between occupational activity and BMI
Church et al (2011) study findingsoveral decrease in national US occupational activity by an average of 100kcal. increase in weight gain. could be concluded that the decrease in occupational expenditure lead to weight gain.
Church et al (2011) study strengths and limitationsobservational study. surveys used were self report. did not account for many many confounding variables.
Lee et al (2010) women and weight gain prevention study infocohort of nearl 35000 women, 13 years follow up. repeated self report of PA and weight throughout study
Lee et al (2010) study findings60 mins of PA a day was enough to prevent women with a BMI <25 from gaining weight. more active = less likely to gain weight. mean weight gain was 2.6kg
Lee et al (2010) study strengths and limitationsobservational, only women, self report bias
ACSM Donelly et al (2009) recommends; 150-200 mins of activity per week to prevent weight gain. 1200-2000kcal burnt per week prevents weight gain of more than 3%. PA increases weight loss if dietary restriction is modest, but not if dietary restriction is severe (doesnt make a difference)
Church et al (2007) women and weight loss interventions study infooverweight or obese post-menopausal women. 6 month intervention, 30 mins, 5 days/week is the NIH recommended amount, moderate intensity - participants were grouped into 50%, 100% and 150% of that recommended amount
Church et al (2007) study findingsthe recommendations are a very inneffective intervention, mean weight loss of less than 2kg over 6 months for those doing the 100% of NIH guidelines
Church et al (2007) study strengths and weaknessesrandomised control trial. only 464 women. exercise intervention strictly controlled.
Ross et al (2000) diet vs exercise induced weight loss study info52 obese men: diet & weight loss, exercise &weight loss, exercise without weight loss and control groups.
Ross et al (2000) study findingsdiet group lost more weight, increased energy deficit. exercise can induce significant weight loss when diet is standardised. even without weight loss, metabolic and fitness outcomes improve.
Ross et al (2000) study strengths and limitationsRCT. controlled interventions. strong outcomes. however high efficacy and low effectiveness ie not realistic in real life practice when diet and exercise variables are less likely to be as controlled
Anderson et al (1999) whole study33 OW middle aged women. those successful at maintaining weight loss were very physically active. lifestyle interventions rather than structured interventions lasted longer.
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