Sleep

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Dr Angelo Tremblay discusses obesity prevention in 2011 and beyond. This is part one of his presentation, which focuses on the role of sleep in the prevention of obesity.

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Sleep

  1. 1. How do wepreventobesityin 2011?<br />Angelo Tremblay<br />Division of Kinesiology<br />
  2. 2. How do wepreventobesityin 2011?<br /><ul><li>By counteracting the impact of obesogenicenvironmentalfactors
  3. 3. By promotingadequatesleep
  4. 4. By increasing the physicalwork/cognitive effort ratio
  5. 5. By investing in nutrition competence and healthyfoodavailability
  6. 6. By promotinghealthyfood-relatedbehaviours
  7. 7. By investing in preventivepharmacology !!!</li></li></ul><li>The QuebecFamilyStudyexperience<br />
  8. 8. Risk factors for overweight and obesity in adulthood: Results from the Quebec Family Study<br />Risk factors Adjusted OR BW (kg) vs<br /> (cross-sectional) reference category<br /> (6 y follow-up)<br />Short sleep duration 3.81* 1.65<br />High disinhibition eating 3.8* 1.46<br />behavior<br />Low dietary calcium intake 2.88* 1.3<br />High susceptibility to hunger 2.2* 1.28<br />behavior<br />Non-participation in high-intensity 2.03* 1.23<br />physical exercise<br />High dietary restraint behavior 2.01* 1.09<br />Non-consumption of multivitamin 1.86* 0.87 <br />and dietary supplements<br />High dietary lipid intake 1.64** 0.61<br />High alcohol intake 1.37** 0.39<br />*p < 0.01, ** p < 0.05<br />Adapted from Chaput et al, Obesity 2009<br />
  9. 9. How do wepreventobesityin 2011?<br /><ul><li>By counteracting the impact of obesogenicenvironmentalfactors
  10. 10. By promotingadequatesleep
  11. 11. By increasing the physicalwork/cognitive effort ratio
  12. 12. By investing in nutrition competence and healthyfoodavailability
  13. 13. By promotinghealthyfood-relatedbehaviours
  14. 14. By investing in preventivepharmacology!!!</li></li></ul><li>Effect of sleep curtailment on appetite control<br />Design: randomized, 2-period, 2-condition crossover clinical study in 12 healthy men<br />Intervention: 2 days of sleep restriction and 2 days of sleep extension under controlled conditions of caloric intake and physical activity<br />Results: plasma leptin (18%) ghrelin (28%) hunger (24%) <br /> appetite (23%)<br /> Spiegel K et al. Ann Intern Med (2004).<br />
  15. 15. Mean body composition in female short sleepers<br />5-6 hours 7-8 hours <br />(n=42) (n=239) <br />Weight (kg) 75.7 70.5* <br />BMI (kg/m2) 29.8 27.3* <br />Body fat mass (kg) 29.2 23.3* <br />Body fat (%) 36.1 31.6* <br />Waist girth (cm) 88.1 83.2* <br />Sum of 6 skinfolds (mm)168.9 144.2*<br />* Significant difference (p<0.05).<br /> Chaput et al.Obesity15: 253-261, 2007 <br />
  16. 16. Correlations between sleep duration and body weight in boys of the “Québec en Forme” Project<br />r = –0.33, p < 0.01<br />n = 211<br />*adjusted for age<br />Chaput et al.Int. J. Obes. 30: 1080-1085, 2006.<br />
  17. 17. Relationship between potential risk factors and childhood overweight/obesity<br />Adapted from Chaput et al.Int. J. Obes. 30: 1080-1085, 2006.<br />
  18. 18. Acute partial sleepdeprivationincreasesfoodintake in healthy men<br />Values are means. * p < 0.01<br />AdaptedfromBrondel et al, AJCN 91:1550-59, 2010<br />
  19. 19. From Schmid et al. AJCN 90: 1476-82, 2009<br />

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