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Title: Actigraph calibration in obese/overweight and type 2 Diabetes Mellitus middle-aged to old adult patients
Authors: Lopes, Vítor P.
Magalhães, Pedro M.
Bragada, José A.
Vasques, Catarina
Keywords: Intervention study
Exercise prescription
Motion sensors
Issue Date: 2009
Publisher: Human Kinetics
Citation: Lopes, Vítor P.; Magalhães, Pedro M.; Bragada, José A.; Vasques, Catarina (2009) - Actigraph calibration in obese/overweight and type 2 Diabetes Mellitus middle-aged to old adult patients. Journal of Physical Activity and Health. ISSN 1543-3080. 6:1. p. S133-S140
Abstract: Background: Several methods exist to asses and control physical intensity levels of subjects engaged in physical activities programs, accelerometry is a method that could be easily used in the field. The purposes were: to calibrate Actigraph in middle-aged to old obese/overweight and DM2 adult patients; and to determine the threshold counts for sedentary, light, moderate, and vigorous physical activity (PA). Methods: Sample comprise 26 participants (62.6 ± 6.5 years of age) of both gender. Counts and VO2 were simultaneously assessed during: resting, seating, standing, walking at 2.5 km·h–1, 5 km·h–1, and 6 km·h–1. A hierarchical linear model was used to derive a regression equation between MET and counts. Receiver operating characteristics (ROC) analysis was used to define thresholds for PA levels. Results: The regression equation was: MET = 1.388400490262 + 0.001312683420044 (counts·min–1), r = .867. The threshold counts for sedentary-light, light-moderate and moderate-vigorous PA were: 200, 1240, 2400 counts·min–1 respectively. Conclusion: The Actigraph is a valid and useful device for the assessment of the amount of time spent in each PA intensity levels in obese/overweight and DM2 middle-aged to old adult patients.
ISSN: 1543-3080
Appears in Collections:DCDEF - Artigos em Revistas Indexados ao ISI/Scopus

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