Compliance With National Guidelines for Physical Activity in U.S. Preschoolers: Measurement and Interpretation

OBJECTIVE: The National Association for Sport and Physical Education (NASPE) guidelines for preschoolers recommend 120 minutes of physical activity daily. Two issues, however, create a situation whereby substantial variation in estimated prevalence rates of (in)active preschoolers are reported. First, NASPE guidelines have been interpreted in multiple ways. Second, objective monitoring via accelerometry is the most widely accepted measure of preschoolers' physical activity, yet multiple cut points provide vastly different estimates of physical activity. This study aimed to estimate the prevalence of preschoolers meeting NASPE guidelines and illustrate the differences among rates, given guideline interpretations, and cut points. PATIENTS AND METHODS: Three- to 5-year-old children (n = 397) wore ActiGraph accelerometers for an average of 5.9 days. NASPE guidelines were expressed in 3 ways: 120 minutes daily of light-to-vigorous physical activity; 120 minutes daily of moderate-to-vigorous physical activity; and 60 minutes daily of moderate-to-vigorous physical activity. Estimates of 120 minutes daily of light-to-vigorous physical activity, 120 minutes daily of moderate-to-vigorous physical activity, and 60 minutes daily of moderate-to-vigorous physical activity were calculated on the basis of 4 common accelerometer cut points for preschoolers: Pate, Reilly and Puyau, Sirard, and Freedson. RESULTS: Prevalence rates varied considerably, with estimates ranging from 13.5% to 99.5%, 0.0% to 95.7%, and 0.5% to 99.5% for 120 minutes daily of light-to-vigorous physical activity, 120 minutes daily of moderate-to-vigorous physical activity, and 60 minutes daily of moderate-to-vigorous physical activity, respectively. CONCLUSIONS: The variation in NASPE guidelines, coupled with different accelerometer cut points, results in disparate estimates of (in)active preschoolers. This limits the ability to estimate population prevalence levels of physical activity that can be used to guide public health policy. Development of new guidelines should focus on an explicit delineation of physical activity and attempt to standardize the measurement of preschoolers' physical activity.

[1]  S. Grant,et al.  Objective measurement of physical activity and sedentary behaviour: review with new data , 2008, Archives of Disease in Childhood.

[2]  R. Sorelle.  US Department of Health and Human Services gives states wider latitude in choosing services to be covered by Medicaid. , 2001, Circulation.

[3]  J. Mota,et al.  Compliance with physical activity guidelines in preschool children , 2010, Journal of sports sciences.

[4]  Gregory J. Welk,et al.  Predictive validity of an age-specific MET equation among youth of varying body size , 2007, European Journal of Applied Physiology.

[5]  M. Puyau,et al.  Validation and calibration of physical activity monitors in children. , 2002, Obesity research.

[6]  G. Cardon,et al.  Are Preschool Children Active Enough? Objectively Measured Physical Activity Levels , 2008, Research quarterly for exercise and sport.

[7]  K. Ginsburg.  The Importance of Play in Promoting Healthy Child Development and Maintaining Strong Parent-Child Bonds , 2007, Pediatrics.

[8]  S. Grant,et al.  An objective method for measurement of sedentary behavior in 3- to 4-year olds. , 2003, Obesity research.

[9]  Jeffrey B. Schwimmer,et al.  Preventing Childhood Obesity: Health in the Balance , 2005, Environmental Health Perspectives.

[10]  S. Trost,et al.  Calibration and Evaluation of an Objective Measure of Physical Activity in Preschool Children , 2005 .

[11]  R. Pate,et al.  Factors related to objectively measured physical activity in preschool children. , 2009, Pediatric exercise science.

[12]  Michael W. Beets,et al.  Evaluation of policies to promote physical activity in afterschool programs: are we meeting current benchmarks? , 2010, Preventive medicine.

[13]  Dylan P Cliff,et al.  Comparison of two sets of accelerometer cut-off points for calculating moderate-to-vigorous physical activity in young children. , 2007, Journal of physical activity & health.

[14]  John J Reilly,et al.  Low levels of objectively measured physical activity in preschoolers in child care. , 2010, Medicine and science in sports and exercise.

[15]  Russell R. Pate,et al.  Validation and Calibration of an Accelerometer in Preschool Children , 2006, Obesity.

[16]  Patty Freedson,et al.  Calibration of accelerometer output for children. , 2005, Medicine and science in sports and exercise.

[17]  Marsha Dowda,et al.  CALIBRATION OF THE COMPUTER SCIENCE AND APPLICATIONS, INC. (CSA) ACCELEROMETER 256 , 1997 .

[18]  A. Okely,et al.  Predictive validity of three ActiGraph energy expenditure equations for children. , 2006, Medicine and science in sports and exercise.

[19]  J. Eisenmann,et al.  Physical Activity, Media Time, and Body Composition in Young Children. , 2006, Journal of physical activity & health.

[20]  R. Pate,et al.  Measurement of physical activity in preschool children. , 2010, Medicine and science in sports and exercise.

[21]  Russell R. Pate,et al.  Motor Skill Performance and Physical Activity in Preschool Children , 2008, Obesity.

[22]  J. Torner,et al.  Fatness, physical activity, and television viewing in children during the adiposity rebound period: the Iowa Bone Development Study. , 2002, Preventive medicine.

[23]  A. Okely,et al.  Adherence to physical activity and electronic media guidelines in Australian pre‐school children , 2009, Journal of paediatrics and child health.

[24]  P. Tucker,et al.  The physical activity levels of preschool-aged children: A systematic review , 2008 .

[25]  R. Whitaker,et al.  Resurrecting free play in young children: looking beyond fitness and fatness to attention, affiliation, and affect. , 2005, Archives of pediatrics & adolescent medicine.