Evaluation of a Commercial Accelerometer (Tritrac-R3 D) to Measure Energy Expenditure During Ambulation
| Autor: | T. E. Kirby, N. Leenders, Barbara A. Smith, D. M. Morris, D. J. Frid, W. M. Sherman, R. A. Petosa |
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| Rok vydání: | 1998 |
| Předmět: |
Adult
Male medicine.medical_specialty Population Physical activity Physical Therapy Sports Therapy and Rehabilitation Walking Accelerometer Oxygen Consumption Heart Rate Statistics medicine Humans Orthopedics and Sports Medicine Exertion Treadmill education Respiratory exchange ratio Mathematics Analysis of Variance education.field_of_study Pulmonary Gas Exchange Calorimetry Indirect Intensity (physics) Energy expenditure Evaluation Studies as Topic Exercise Test Physical therapy Regression Analysis Female Energy Metabolism |
| Zdroj: | International Journal of Sports Medicine. 19:43-47 |
| ISSN: | 1439-3964 0172-4622 |
| Popis: | This study evaluated the ability of a commercially available accelerometer (Tritrac-R3 D) to measure energy expenditure in 16 subjects at rest (pre- and post-exercise) and during three different intensities of steady-state exercise (40-70 % of peak oxygen consumption [VO 2 peak]) while ambulating on a treadmill (no grade). Oxygen consumption and the respiratory exchange ratio from indirect calorimetry and the vector magnitude of triaxial accelerations were used to estimate energy expenditure using the manufacturers equations. There was a significant relationship between indirect calorimetry-derived energy expenditure and the energy expenditure derived from the accelerometer (r = 0.96). Using analysis of variance, there was no difference in the energy expenditure derived by the two methods at rest before exercise and during the three different intensities of ambulatory exercise.There was a significant difference between energy expenditure derived via indirect calorimetry and with the accelerometer during rest after exercise, probably due to the failure of the accelerometer to accurately estimate the energy expenditure associated with the progresssive decline in post-exercise oxygen consumption. Thus, this commerically available accelerometer appears to provide statistically acceptable estimates of energy expenditure at rest and during zero-grade treadmill ambulation up to about 70 % VO 2 peak. This may indicate its acceptable utility for large-scale population studies of physical activity involving this mode of movement. The failure of the accelerometer to accurately estimate energy expenditure during recovery from exercise may contribute to an underestimation of energy expenditure in some physically active individuals. |
| Databáze: | OpenAIRE |
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