title: Comparison of the RT3 Research Tracker and Tritrac R3D accelerometers during a backpacking expedition by a single subject.
abstract: This study compared the RT3 Research Tracker accelerometer and the Tritrac R3D accelerometer in a field setting. A six-day backpacking expedition (122.4 km in length) was completed by a single subject in the Grand Canyon National Park, Arizona. The overall correlation between the counts of vector magnitude activity for the RT3 and R3D was moderate (r =.75, p<.001), with the overall calculated bias [mean difference (RT3 minus R3D) and standard deviation of the differences] across all six days estimated at 235+/-436 vector magnitude activity counts. However, agreement between the instruments is problematic; the RT3 might be 201 activity counts below or 671 activity counts above the R3D in assessing physical activity during backpacking.
authors.affiliation: Department of Health and Exercise Science, Colorado State University, Fort Collins, 80523, USA. devoe@cahs.colostate.edu
authors.forename: Dale
authors.initials: D
authors.lastname: DeVoe
mesh_terms: D000054:Acceleration; D004867:Equipment Design; D006801:Humans; D008297:Male; D008432:Mathematical Computing; D008875:Middle Aged; D009043:Motor Activity; D009068:Movement / Q000502:physiology; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*