Physical Activity Patterns of Inner-City Elementary Schoolchildren

TROST, STEWART G.; MCCOY, TARA A.; VANDER VEUR, STEPHANIE S.; MALLYA, GIRIDHAR; DUFFY, MEGHAN L.; FOSTER, GARY D.

Medicine & Science in Sports & Exercise: March 2013 - Volume 45 - Issue 3 - p 470–474
doi: 10.1249/MSS.0b013e318275e40b
Epidemiology

Purpose: This study aimed to objectively measure the physical activity (PA) characteristics of a racially and ethnically diverse sample of inner-city elementary schoolchildren and to examine the influence of sex, race/ethnicity, grade level, and weight status on PA.

Methods: A total of 470 students in grades 4–6 from six inner-city schools in Philadelphia wore an ActiGraph GT3X+ accelerometer (Actigraph, Pensacola, FL) for up to 7 d. The resultant data were uploaded to a customized Visual Basic EXCEL macro to determine the time spent in sedentary (SED), light-intensity PA (LPA), and moderate- to vigorous-intensity PA (MVPA).

Results: On average, students accumulated 48 min of MVPA daily. Expressed as a percentage of monitoring time, students were sedentary for 63% of the time, in LPA 31% of the time, and in MVPA 6% of the time. Across all race/ethnicity and grade level groups, boys exhibited significantly higher levels of MVPA than girls did; fifth-grade boys exhibited significantly lower MVPA levels than fourth- and sixth-grade boys did, and sixth-grade girls exhibited significantly lower MVPA levels than fourth- and fifth-grade girls did. Hispanic children exhibited lower levels of MVPA than children from other racial/ethnic groups did, and overweight and obese children exhibited significantly lower MVPA levels than children in the healthy weight range did. Across the entire sample, only 24.3% met the current public health guidelines for PA. Physical inactivity was significantly greater among females, Hispanics, and overweight and obese students.

Conclusions: Fewer than one in four inner-city schoolchildren accumulated the recommended 60 min of MVPA daily. These findings highlight the need for effective and sustainable programs to promote PA in inner-city youth.

1School of Human Movement Studies, The University of Queensland, AUSTRALIA; 2Center for Obesity Research and Education, Temple University, Philadelphia, PA; and 3Department of Public Health, Philadelphia, PA

Address for correspondence: Stewart G. Trost, Ph.D., School of Human Movement Studies, The University of Queensland, St. Lucia, QLD 4072, Australia; E-mail: s.trost@uq.edu.au.

Submitted for publication May 2012.

Accepted for publication September 2012.

© 2013 American College of Sports Medicine