Abstract
This research utilizes a self-developed inertial sensor in conjunction with a motion tracking system and four Smart Bands to record a runner's movements and extract parameters such as step numbers, length, and frequencies at different running speeds. The data obtained were processed to find the number of steps taken. These steps were also recorded by an IMU (inertial measurement unit) and motion tracking system (MoCap-Motion Capturing) and used to compare the different systems and find their agreement at different running speeds. The results show a very strong correlation between the IMU and the motion tracking system with r(2) = 0.968 at 6 km/h, r(2) = 0.991 at 8 km/h, r(2) = 0.991 at 10 km/h, and r(2) = 0.996 at 12 km/h. The Xiaomi Mi Band 2 showed an r(2) = 0.861 at 6 km/h, r(2) = 0.985 at 8 km/h, r(2) = 0.977 at 10 km/h, and r(2) = 0.987 at 12 km/h and can therefore be considered a good replacement for an IMU.