• 1
    Maggard MA, Shugarman LR, Suttorp M et al. Meta-analysis: surgical treatment of obesity. Ann Intern Med 2005; 142: 547549.
  • 2
    Sjöström L, Narbro K, Sjöström CD et al. Effects of bariatric surgery on mortality in Swedish obese subjects. JAMA 2007; 357: 741752.
  • 3
    Karlsson J, Taft C, Ryden A, Sjöström L, Sullivan M. Ten year trends in health-related quality of life after surgical and conventional treatment for severe obesity: the SOS intervention study. Int J Obes 2007; 31: 12481261.
  • 4
    Hsu LKG, Benotti PN, Dwyer J et al. Nonsurgical factors that influence the outcome of bariatric surgery. Psychosom Med 1998; 60: 338346.
  • 5
    Sarwer DB, Wadden TA, Fabricatore AN. Psychosocial and behavioral aspects of bariatric surgery. Obes Res 2005; 13: 639648.
  • 6
    Torquati A, Lufti RE, Richards WO. Predictors of early quality-of-life improvement after laparoscopic gastric bypass surgery. Am J Surg 2007; 193: 471475.
  • 7
    Klem ML, Wing RR, Chang CC et al. A case-control study of successful maintenance of a substantial weight loss: individuals who lost weight through surgery versus those who lost weight through non-surgical means. Int J Obes Relat Metab Disord 2000; 24: 573579.
  • 8
    Bond DS, Evans RK, Wolfe LG et al. Impact of self-reported physical activity participation on proportion of excess weight loss and BMI among gastric bypass surgery patients. Am Surg 2004; 70: 811814.
  • 9
    Silver HJ, Torquati A, Jensen GL, Richards WO. Weight, dietary and physical activity behaviors two years after gastric bypass. Obes Surg 2006; 16: 859864.
  • 10
    Evans RK, Bond DS, Wolfe LG et al. Participation in 150 min/wk of moderate or higher intensity physical activity yields greater weight loss after gastric bypass surgery. Surg Obes Relat Dis 2007; 3: 526530.
  • 11
    Chevallier JM, Paita M, Rodde-Dunet MH et al. Predictive factors of outcome after gastric banding: a nationwide survey on the role of center activity and patients' behavior. Ann Surg 2007; 246: 10341039.
  • 12
    Boan J, Kolotkin RL, Westman EC, McMahon RL, Grant JP. Binge eating, quality of life and physical activity improve after Roux-en-Y gastric bypass for morbid obesity. Obes Surg 2004; 14: 341348.
  • 13
    Mathus-Vliegen EM, de Wit LT. Health-related quality of life after gastric banding. Br J Surg 2007; 94: 457465.
  • 14
    Bond DS, Evans RK, DeMaria E et al. Physical activity and quality of life improvements before obesity surgery. Am J Health Behav 2006; 30: 422434.
  • 15
    Craig CL, Marshall AL, Sjöström M et al. International physical activity questionnaire: 12-country reliability and validity. Med Sci Sports Exerc 2003; 35: 13811395.
  • 16
    Tehard B, Saris WHM, Astrup A et al. Comparison of two physical activity questionnaires in obese subjects: the NUGENOB study. Med Sci Sports Exerc 2005; 37: 15351541.
  • 17
    Jakicic JM, Marcus BH, Gallagher KI, Napolitano M, Lang W. Effect of exercise duration and intensity on weight loss in overweight, sedentary women. A randomized trial. Med Sci Sports Exerc 2002; 34: 16531659.
  • 18
    Slentz CA, Aiken LB, Houmard JA et al. Inactivity, exercise, and visceral fat. STRRIDE: a randomized, controlled study of exercise intensity and amount. J Appl Physiol 2005; 99: 16131618.
  • 19
    Jakicic JM, Clark K, Coleman E et al. American College of Sports Medicine position stand. Appropriate intervention strategies for weight loss and prevention of weight regain for adults. Med Sci Sports Exerc 2001; 33: 21452156.
  • 20
    Saris WH, Blair SN, van Baak MA et al. How much physical activity is enough to prevent unhealthy weight gain? Outcome of the IASO first Stock Conference and consensus statement. Obes Rev 2003; 4: 101114.
  • 21
    Tate DF, Jeffery RW, Sherwood NE, Wing RR. Long-term weight losses associated with prescription of higher physical activity goals. Are higher levels of physical activity protective against weight regain? Am J Clin Nutr 2007; 85: 954959.
  • 22
    Ware JE, Kosinski M, Dewey JE. How to score version 2 of the SF-36® Health Survey. QualityMetric: Lincoln, RI, 2000.
  • 23
    Ware JE. SF-36 Health Survey update. Spine 2000; 25: 31303139.
  • 24
    Wadden TA, Phelan S. Assessment of quality of life in obese individuals. Obes Res 2002; 10 (Suppl 1):50S57S.
  • 25
    Dixon JB, Dixon ME, O'Brien PE. Quality of life after lap-band placement: influence of time, weight loss and comorbidities. Obes Res 2001; 9: 713721.
  • 26
    American Society for Bariatric Surgery Standards. Guidelines for weight calculations and follow-up in bariatric surgery. Surg Obes Relat Dis 2005; 1: 6768.
  • 27
    Macera CA, Ham SA, Yore MM et al. Prevalence of physical activity in the United States: Behavioral Risk Factor Surveillance System, 2001. Prev Chron Dis 2005; 2: A17.
  • 28
    Di Pietro L, Dziura J, Blair SN. Estimated change in physical activity level (PAL) and prediction of 5-year weight change in men: the Aerobics Center Longitudinal Study. Int J Obes 2004; 28: 15411547.
  • 29
    Raftopoulos Y, Gatti GG, Luketich JD, Courcoulas AP. Advanced age and sex as predictors of adverse outcomes following gastric bypass surgery. JSLS 2005; 9: 272276.
  • 30
    Herpetz S, Kielmann R, Wolf AM. Does obesity surgery improve psychosocial functioning? A systematic review. Int J Obes 2003; 27: 13001314.
  • 31
    Wendel-Vos GC, Schuit AJ, Tijhuis MA, Kromhout D. Leisure time physical activity and health-related quality of life: cross-sectional and longitudinal associations. Qual Life Res 2004; 13: 667677.
  • 32
    Tessier S, Vuillemin A, Bertrais S et al. Association between leisure-time physical activity and health-related quality of life changes over time. Prev Med 2007; 44: 202208.
  • 33
    Maciejewski ML, Patrick D, Williamson DF. A structured review of randomized controlled trials of weight loss showed little improvement in health-related quality of life. J Clin Epidemiol 2005; 58: 568578.
  • 34
    Nelson HK, Robson PJ, Friedenreich CM, Csizmadi I. Estimating activity energy expenditure: how valid are physical activity questionnaires? Am J Clin Nutr 2008; 87: 279291.
  • 35
    Phelan S, Roberts M, Lang W, Wing R. Empirical evaluation of physical activity recommendations for weight control in women. Med Sci Sport Exerc 2007; 39: 18321836.