Background: Regular physical activity is proven to help prevent and treat noncommunicable diseases (NCDs) such as heart disease, stroke, diabetes and breast and colon cancer. The exercise data generated by health&fitness devices (treadmill, exercise bike, etc.) is very important for health management service providers to develop personalized training programs. However, at present, there is little research on a unified interoperability framework in the health&fitness domain, and there are not many solutions, and the privatized treadmill data transmission scheme is not conducive to data integration and analysis. Objective: This article will expand the IEEE 11073-PHD standard protocol family, develop standards for health&fitness device (using treadmill as an example) based on the latest version of the 11073-20601 optimized exchange protocol; design protocol standards compliance testing process and inspection software which can automatically detect whether the instantiated object of the treadmill meets the standard. Results: According to the characteristics of the treadmill, a data exchange framework conforming to 11073-PHD is constructed, and a corresponding testing framework is developed; a treadmill agent simulation is implemented and the interoperability test is done. Through the designed testing process, the corresponding testing software was developed to complete the standard compliance testing of the treadmill. Conclusions: Through the extended research of 11073-PHD in the field of health & fitness, it provides a potential new idea for the data transmission framework of sports equipment such as treadmills, which may also provide some help for the development of sports health equipment interoperability standards.