Paper
Difference in Caloric Expenditure Measured by Indirect Calorimetry and Estimated by Elliptical Increases Over Time: 2825 Board #140 May 29, 2
Published May 1, 2015 · A. P. Glave, Jennifer J. Didier, Stevyn M. Rivera
Medicine & Science in Sports & Exercise
0
Citations
0
Influential Citations
Abstract
Caloric expenditure estimated by cardiovascular exercise equipment is generally accepted as inaccurate by exercise scientists and others in the fitness industry, but there is little research to the extent of the inaccuracy or if inaccuracy increases with exercise time. PURPOSE: The purpose of this study was to compare caloric expenditure measured via indirect calorimetry to the caloric expenditure estimated by an elliptical machine, specifically if the difference was consistent throughout the duration of the workout. METHODS: Participants were 30 healthy adults (age: 25.43 ± 7.65 y; height: 1.69 ± 0.09 m; weight: 71.24 ± 15.68 kg). Participants completed 30 minutes of exercise on an elliptical machine consisting of a 5 minute warm-up (intensity less than 65% of estimated maximum heart rate), 25 minutes of moderate intensity exercise (HR of 64-76%), and a 5 minute cool down. Caloric expenditure was recorded every 5 minutes using an indirect calorimetry caloric expenditure measurement tool. A repeated measures ANOVA was used to compare the differences over time. TTests were used as a follow-up and compared consecutive measurements (5 min vs. 10 min, 10 min vs. 15 min, etc.) RESULTS: The difference between readings increased over time: 5 min 19.04, 10 min 44.52, 15 min 69.68, 20 min 95.10, 25 min 120.42. Difference in caloric expenditure was significantly different over time (F(4,26) = 613.87, p < .0001). There was also a significant difference for each time point comparison (all p < .0001) CONCLUSIONS: The difference between caloric expenditure measured by indirect calorimetry and estimated by an elliptical machine differs over time with the difference becoming greater over time, with an increase of around 25 calories per 5 minutes of exercise during moderate intensity exercise. This overestimate could lead individuals to assume they are burning more calories than they actually are which could lead to eating additional calories and negating the workout.
Non-RCTSign up to use Study Snapshot
Consensus is limited without an account. Create an account or sign in to get more searches and use the Study Snapshot.
Full text analysis coming soon...