However this function is only one part of the utility of the device. This Web-enabled device works with proprietary software and a docking port that downloads data from the device into a personnel file at the Stayhealthy Web site. At this site users can track their personal calorie use, customize a personnel fitness and nutrition program and link to a wide range of health and nutrition information, service and product resources personalized to their needs and interests. The main methods are the pedometer, ergometer and single-direction accelerometers. Pedometers simply keep track of how many steps a person takes and have limited accuracy for other types of movement.
Ergometers integrate multi-dimensional motion sensing technology into compact devices.
The CT1 takes the best of these designs by combing a small, portable device that can be worn comfortably by anyone, with Web-enabling software. Stayhealthy owns the technology for the device and has developed the software using algorithms that allow for gender, weight, height, ethnicity, age and other specific factors and for the specific types of activities and motions detected by the device. During the past several years the CT1 technology has been tested in various formats to allow for refinement of the algorithms to achieve greater accuracy. The CT1 uses Tri-Trac technology to record automatically and the Web site allows for interactive refinement of the calories and encourages compliance with fitness programs. Meuer, G. A., Westerterp, K. R., Verhoeven, M. H., Koper, B.M., and Hoor, F. Methods to assess physical activity with special reference to motion sensors and accelerometers.