A Comparison of Three Models of Ellipticdal Trainer
Abstract
Elliptical trainers provide strenuous exercise for large muscle groups with less ground force reaction than running. The reduced ground force makes an elliptical trainer bout a potential alternative to the 1.5-mi run in the U.S. Navy Physical Readiness Test (PRT). This alternative could reduce the risks associated with testing, particularly for individuals who otherwise might receive a medical waiver for that portion of the PRT. Previous investigations established the feasibility of elliptical trainer testing for Life Fitness CT 9500HR machines. The present investigation examined two additional machines, Precor EFX 556 and Nautilus E916, because Lifestyle Fitness machines are not available at all potential test sites. The Lifestyle Fitness investigations indicated that calorie reports from the elliptical trainers predicted 1.5-mi run time after allowing for a positive bias in the reports. An algorithm to convert elliptical trainer performance to equivalent run time was developed. The present investigation compared Precor and Nautilus machines to the Lifestyle Fitness machine. These machines provide biased estimates of calorie expenditure. The size of the bias was the only difference between machines. The test algorithm developed for the Life Fitness machine should accurately convert Nautilus and Precor calorie reports to run times after adjusting for bias differences.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 2006
- Accession Number
- ADA462116
Entities
People
- James A. Hodgon
- Lisa Griswold
- Ross R. Vickers
Organizations
- Naval Health Research Center