Tom J Hazell1, Caitlin V L Ellery2, Tamara R Cohen2, Catherine A Vanstone2, Celia J Rodd3, Hope A Weiler2. 1. Department of Kinesiology and Physical Education, Wilfrid Laurier University, Waterloo, Ontario, Canada. 2. School of Dietetics and Human Nutrition, McGill University, Montreal, Québec, Canada. 3. Children's Hospital, University of Manitoba, Winnipeg, Manitoba, Canada.
Abstract
BACKGROUND: Currently, there is a limited amount of research exploring physical activity measurement tools in overweight and obese (OW/OB) children using pedometers. Thus, our objective was to determine the accuracy of one spring-levered (SC-T2) and two piezoelectric pedometers (NL-1000 and Piezo) in OW/OB children. METHODS: A total of 26 boys and 34 girls (n = 60) participated. Pedometer step-counts were compared to observed step counts for walking (walking, stair ascent and decent) and hopping tests. Pedometer accuracies were compared with Friedman tests while Bland-Altman plots were used to establish the accuracy of each pedometer against direct observations. RESULTS: Boys (n = 26) and females (n = 34) were 96 and 91% OB, respectively. The two piezoelectric pedometers (NL-1000 and Piezo) were accurate for walking and stair climbing tasks, however all pedometers were inaccurate for hopping tests. Averaged over all three walking activities, the NL-1000 was the most accurate with 6.7% median error (interquartile range (IQR): 0.0-13.3); followed by the Piezo with 10.0% median error (IQR: 3.3-18.1); SC-T2 was the least accurate with -14.7% median error (IQR: -54.8-3.5). CONCLUSION: These results support the use of the piezoelectric pedometers for walking and stair climbing types of activities, which are typical for OW/OB children in a nonlaboratory setting.
BACKGROUND: Currently, there is a limited amount of research exploring physical activity measurement tools in overweight and obese (OW/OB) children using pedometers. Thus, our objective was to determine the accuracy of one spring-levered (SC-T2) and two piezoelectric pedometers (NL-1000 and Piezo) in OW/OBchildren. METHODS: A total of 26 boys and 34 girls (n = 60) participated. Pedometer step-counts were compared to observed step counts for walking (walking, stair ascent and decent) and hopping tests. Pedometer accuracies were compared with Friedman tests while Bland-Altman plots were used to establish the accuracy of each pedometer against direct observations. RESULTS:Boys (n = 26) and females (n = 34) were 96 and 91% OB, respectively. The two piezoelectric pedometers (NL-1000 and Piezo) were accurate for walking and stair climbing tasks, however all pedometers were inaccurate for hopping tests. Averaged over all three walking activities, the NL-1000 was the most accurate with 6.7% median error (interquartile range (IQR): 0.0-13.3); followed by the Piezo with 10.0% median error (IQR: 3.3-18.1); SC-T2 was the least accurate with -14.7% median error (IQR: -54.8-3.5). CONCLUSION: These results support the use of the piezoelectric pedometers for walking and stair climbing types of activities, which are typical for OW/OBchildren in a nonlaboratory setting.
Authors: Tim Lobstein; Rachel Jackson-Leach; Marjory L Moodie; Kevin D Hall; Steven L Gortmaker; Boyd A Swinburn; W Philip T James; Youfa Wang; Klim McPherson Journal: Lancet Date: 2015-02-19 Impact factor: 79.321
Authors: Mark S Tremblay; Darren E R Warburton; Ian Janssen; Donald H Paterson; Amy E Latimer; Ryan E Rhodes; Michelle E Kho; Audrey Hicks; Allana G Leblanc; Lori Zehr; Kelly Murumets; Mary Duggan Journal: Appl Physiol Nutr Metab Date: 2011-02 Impact factor: 2.665