Validity of SC-StepRx pedometer-derived moderate and vigorous physical activity during treadmill walking and running in a heterogeneous sample of children and youth

BMC Public Health

Mark Stephen Tremblay²  Zachary Michael Ferraro²  Afekwo Mbonu³  Allison McFarlane¹  Michael Marc Borghese²  Casey Ellen Gray¹  Travis John Saunders² 

[1] Healthy Active Living and Obesity Research Group, Children’s Hospital of Eastern Ontario Research Institute, 401 Smyth Road, Ottawa, Ontario, Canada;School of Human Kinetics, University of Ottawa, 125 University Private, Ottawa, Ontario, Canada;Department of Health Sciences, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario, Canada

关键词: Activity monitors;    Walking;    Running;    Locomotion;    Physical activity;   

Others  :  1130203
DOI  :  10.1186/1471-2458-14-519

 received in 2013-12-11, accepted in 2014-05-14,  发布年份 2014

【 摘 要 】

Background

The purpose of this study was to determine the validity of the SC-StepRx pedometer to assess moderate and vigorous physical activity during treadmill walking and running in a heterogeneous sample of children and youth aged 10-17 years.

Methods

Physical activity intensity assessed via indirect calorimetry served as the criterion standard. A convenience sample of 40 participants (20 boys, 20 girls) wore 6 SC-StepRx pedometers, 2 ActiGraph GT3X accelerometers, 2 Actical accelerometers, 1 Walk4Life MVP pedometer and 1 NL-1000 pedometer while walking/running at speeds approximating 2, 3, 4, 6 and 7 METs. Associations between indirect calorimetry and each activity monitor were assessed using linear regression analyses in SAS 9.2.

Results

Estimates of moderate and vigorous physical activity from all monitors were significantly associated with the criterion standard of indirect calorimetry. The strongest associations with the criterion measure were observed for the SC-StepRx with moderate/vigorous thresholds of 110/130 steps•minute⁻¹, and the NL-1000 (R² = 0.82, p <0.05). The SC-StepRx with moderate/vigorous thresholds of 110/130 steps•minute⁻¹ also exhibited the highest combined sensitivity (92.9%) and specificity (96.5%) for correctly identifying a bout of moderate-to-vigorous physical activity.

Conclusions

This study demonstrates that the SC-StepRx pedometer is a valid tool for the measurement of moderate and vigorous physical activity in children and youth.

【 授权许可】

   
2014 Saunders et al.; licensee BioMed Central Ltd.

【 图 表 】

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