Energy expenditure estimates of the Caltrac accelerometer for running, race walking, and stepping
Deutscher übersetzter Titel: | Messwerte des Caltrac-Akzelerometers fuer den Energieverbrauch beim Laufen, beim leichtathletischen Gehen und bei Step-Aerobics |
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Autor: | Swan, P.D.; Byrnes, W.C.; Haymes, E.M. |
Erschienen in: | British journal of sports medicine |
Veröffentlicht: | 31 (1997), 3, S. 235-239, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 0306-3674, 1473-0480 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU199711208027 |
Quelle: | BISp |
Abstract des Autors
Objective: To examine the accuracy of the Caltrac accelerometer for estimating energy expenditure (EE) during three exercise modes. Methods: A subset of 31 women (mean(SEM) age 22.6(5) years) was selected from a training study comparing various physiological parameters during race walking, running, and stepping. Subjects each performed mode specific graded exercise tests to peak VO2. Regression equations for VO2 v heartrate (HR) were generated from each individual's test data. EE (kcal and kJ) was estimated for each VO2 value based on the respiratory exchange ratio, and kcal v HR regression equations were generated to predict EE from each subject's HR data (EE-HR). HR in the field was monitored by telemetry, and two Caltrac monitors, one set for EE and one to give counts, were attached to a belt over opposite hips. Results: EE-HR was not significantly different across exercise modes. Caltrac overestimated EE (P<0.01) in runners (14%) and walkers (19%) but underestimated EE in steppers by about 10% (P=0.12). Conclusions: The Caltrac is a reliable instrument but it did not accurately distinguish EE in running, race walking, or stepping in a group of young women. Verf.-Referat