Oxygen consumption (VO2) is the criterion standard for determining energy expenditure during activity. Newer technologies have resulted in the development of portable metabolic gas analyzers capable of measuring VO2 during a wide range of physical activities in the field. Unfortunately, use of these devices is still limited due to the cost, availability and skill level required to utilize this newer technology. However, there is an instrument which may be utilized. Accelerometers are a type of physical activity monitor that provide estimates of energy expenditure and may potentially be of more practical use in the clinical setting. Purpose: This study was designed to compare estimates of energy expenditure using two different accelerometers to VO2 during self-paced walking speeds in children with spastic diplegia cerebral palsy (CP) and in healthy children (HLT). Methods: Ten HLT children and five children with spastic diplegia CP participated in this pilot study (age range: 7.5-17.5 years). Subjects ambulated at self-paced speeds on a level surface wearing a Caltrac accelerometer and a BioTrainer-Pro accelerometer, while VO2 was measured simultaneously with an AeroSport KB1-C portable metabolic gas analyzer. Results: Both accelerometers overestimated caloric expenditure in HLT children. In the children with spastic diplegia CP, we found no significant differences in the mean caloric expenditure estimated by the accelerometers and VO2 (p= 0.62). Conclusions: Preliminary findings suggest accelerometers may have potential as a means of estimating energy expenditure during ambulation in children with spastic diplegia CP, which could be useful to clinicians evaluating therapeutic interventions. Further research is indicated.




Submission Location


To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.