Document Detail

Validity of the Actical accelerometer step-count function.
MedLine Citation:
PMID:  17596790     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To assess the validity of the new Actical accelerometer step count function.
METHODS: Actical step counts were compared according to two criterion standards. 1) Eight Acticals were assessed using a mechanical shaker table under six different testing conditions. 2) Thirty-eight volunteers (aged 9-59 yr) wore eight Acticals and eight Actigraphs during treadmill walking (50 and 83 m.min(-1)) and running (133 m.min(-1)) for 6 min at each speed. Steps were counted during the second and fourth minutes of each speed by a trained observer.
RESULTS: The correlation between Actical step counts and the mechanical shaker step counts was excellent (r = 1.0). Compared with visually counted steps, both the Actical and Actigraph step counts were significantly different at 50 m.min(-1); however, no significant differences were evident at 83 and 133 m.min(-1). The criterion-related validity correlations (r) for the Actical and Actigraph, respectively, were 0.73 and 0.52 at the slow walk condition and 0.99 and 0.99 at the normal walk and run conditions.
CONCLUSION: The new step count function of the Actical accelerometer provides valid estimates of step counts at 83 and 133 m.min(-1) on a range of healthy participants.
Dale W Esliger; Adam Probert; Sarah Connor Gorber; Shirley Bryan; Manon Laviolette; Mark S Tremblay
Publication Detail:
Type:  Journal Article; Validation Studies    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  39     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2007 Jul 
Date Detail:
Created Date:  2007-06-28     Completed Date:  2007-09-06     Revised Date:  2013-01-28    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1200-4     Citation Subset:  IM; S    
College of Kinesiology, University of Saskatchewan, Saskatoon, Canada.
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MeSH Terms
Exercise Test
Middle Aged
Monitoring, Ambulatory / instrumentation*

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