Abstract
Objective: In epidemiological studies, physical activity is objectively assessed using pedometers and activity
monitors. Understanding the types, features, and accuracies of these devices is crucial for interpreting the results of studies conducted on different devices. This study aimed to systematically collect and organize information on the step-detection methods, step cancellation functions, and memory functions of pedometers and activity monitors
from major Japanese manufacturers, with the goal of facilitating their practical application.
Methods: Three domestic manufacturers were selected: Omron, Yamasa, and Tanita. From each manufacturer’s website, we collected information on the price, weight, placement, step detection methods, and the presence or absence of filter and memory functions, including their duration.
Results: Of the 34 models tested (six from Omron, eight from Yamasa, and 20 from Tanita), three models (two from Yamasa and one from Tanita) used a spring-levered pendulum mechanism and were worn on the waist. The remaining 31 models used accelerometers. All accelerometer models included step cancellation functions, but the setting conditions varied by manufacturer: Omron set it at 4 seconds, Yamasa at 10 stepshows, and Tanita at 7 seconds.
Conclusion: This study shows notable differences in step detection methods, filter functions, and memory functions depending on the manufacturer and device. When conducting research that measures step counts, implementing health guidance, and interpreting the results of measurements using different devices, it is essential to systematically consider the specific characteristics of pedometers and activity monitors.
