Skip to main content
Article thumbnail
Location of Repository

Between-monitor differences in step counts are related to body size: implications for objective physical activity measurement.

By Jeremy Pomeroy, Søren Brage, Jeffrey M Curtis, Pamela D Swan, William C Knowler and Paul W Franks

Abstract

The quantification of the relationships between walking and health requires that walking is measured accurately. We correlated different measures of step accumulation to body size, overall physical activity level, and glucose regulation.Participants were 25 men and 25 women American Indians without diabetes (Age: 20-34 years) in Phoenix, Arizona, USA. We assessed steps/day during 7 days of free living, simultaneously with three different monitors (Accusplit-AX120, MTI-ActiGraph, and Dynastream-AMP). We assessed total physical activity during free-living with doubly labeled water combined with resting metabolic rate measured by expired gas indirect calorimetry. Glucose tolerance was determined during an oral glucose tolerance test.Based on observed counts in the laboratory, the AMP was the most accurate device, followed by the MTI and the AX120, respectively. The estimated energy cost of 1000 steps per day was lower in the AX120 than the MTI or AMP. The correlation between AX120-assessed steps/day and waist circumference was significantly higher than the correlation between AMP steps and waist circumference. The difference in steps per day between the AX120 and both the AMP and the MTI were significantly related to waist circumference.Between-monitor differences in step counts influence the observed relationship between walking and obesity-related traits

Topics: Medicine, R, Science, Q
Publisher: Public Library of Science (PLoS)
Year: 2011
DOI identifier: 10.1371/journal.pone.0018942
OAI identifier: oai:doaj.org/article:e0aafb6baddc482683b133c22d7e723e
Journal:
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • https://doaj.org/toc/1932-6203 (external link)
  • http://europepmc.org/articles/... (external link)
  • https://doaj.org/article/e0aaf... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.