Obesity Epidemiology

142 STUDY DESIGNS AND MEASUREMENTS42. Freedson P, Pober D, Janz KF. Calibration of accelerometer output for children. MedSci Sports Exerc. 2005;37(11 Suppl):S523-S530.43. Campbell KL, Crocker PR, McKenzie DC. Field evaluation of energy expenditure inwomen using Tritrac accelerometers. Med Sci Sports Exerc. 2002;34:1667-1674.44. Welk GJ, Blair SN, Wood K, Jones S, Thompson RW. A comparative evaluation ofthree accelerometry-based physical activity monitors. Med Sci Sports Exerc. 2000;32(9Suppl):S489-S497.45. Bassett DR Jr, Ainsworth BE, Swartz AM, Strath SJ, O’Brien WL, King GA. Validityof four motion sensors in measuring moderate intensity physical activity. Med SciSports Exerc. 2000;32(9 Suppl):S471-S480.46. Hendelman D, Miller K, Baggett C, Debold E, Freedson P. Validity of accelerometryfor the assessment of moderate intensity physical activity in the field. Med Sci SportsExerc. 2000;32(9 Suppl):S442-S449.47. Zhang K, Werner P, Sun M, Pi-Sunyer FX, Boozer CN. Measurement of human dailyphysical activity. Obes Res. 2003;11:33-40.48. Zhang K, Pi-Sunyer FX, Boozer CN. Improving energy expenditure estimation forphysical activity. Med Sci Sports Exerc. 2004;36:883-889.49. Welk GJ. Chapter 8. Use of accelerometry-based activity monitors to assess physicalactivity In: Welk GJ, ed. Physical Activity Assessments for Health-Related Research.Champaign, IL: Human Kinetics, Inc.; 2002.50. Matthew CE. Calibration of accelerometer output for adults. Med Sci Sports Exerc.2005;37:S512-S522.51. Matthews CE, Ainsworth BE, Thompson RW, Bassett DR Jr. Sources of variance indaily physical activity levels as measured by an accelerometer. Med Sci Sports Exerc.2002;34:1376-1381.52. Trost SG. Objective measurement of physical activity in youth: current issues, futuredirections. Exerc Sport Sci Rev. 2001;29:32-36.53. Goran MI. Measurement issues related to studies of childhood obesity: assessment ofbody composition, body fat distribution, physical activity, and food intake. Pediatrics.1998;101(3 Pt 2):505-518.54. Freedson PS. Electronic motion sensors and heart rate as measures of physical activityin children. J Sch Health. 1991;61:220-223.55. Puyau MR, Adolph AL, Vohra FA, Butte NF. Validation and calibration of physicalactivity monitors in children. Obes Res. 2002;10:150-157.56. Eisenmann JC, Strath SJ, Shadrick D, Rigsby P, Hirsch N, Jacobson L. Validityof uniaxial accelerometry during activities of daily living in children. Eur J ApplPhysiol. 2004;91:259-263.57. Lopez-Alarcon M, Merrifield J, Fields DA, et al. Ability of the actiwatch accelerometerto predict free-living energy expenditure in young children. Obes Res.2004;12:1859-1865.58. Janz KF. Chapter 9. Use of heart rate monitors to assess physical activity. In: WelkGJ, ed. Physical Activity Assessments for Health-Related Research. Champaign, IL:Human Kinetics, Inc.; 2002.59. Wareham NJ, Hennings SJ, Prentice AM, Day NE. Feasibility of heart-rate monitoring toestimate total level and pattern of energy expenditure in a population-based epidemiologicalstudy: the Ely Young Cohort Feasibility Study 1994-5. Br J Nutr. 1997;78:889-900.60. Strath SJ, Swartz AM, Bassett DR Jr, O’Brien WL, King GA, Ainsworth BE. Evaluationof heart rate as a method for assessing moderate intensity physical activity. MedSci Sports Exerc. 2000;32(9 Suppl):S465-S470.61. Strath SJ, Bassett DR Jr, Swartz AM, Thompson DL. Simultaneous heart rate-motion sensortechnique to estimate energy expenditure. Med Sci Sports Exerc. 2001;33:2118-2123.62. Strath SJ, Bassett DR Jr, Thompson DL, Swartz AM. Validity of the simultaneousheart rate-motion sensor technique for measuring energy expenditure. Med Sci SportsExerc. 2002;34:888-894.