GAIT CYCLE DETERMINATION SYSTEM, GAIT CYCLE DETERMINATION METHOD, AND PROGRAM STORAGE MEDIUM

In order to easily and accurately determine a walk cycle, this walk cycle determination system is provided with: a reception unit for receiving sensor data including acceleration and angular velocity acquired by a sensor mounted to footwear; a detection unit which generates time-series data of the orientation angle of at least one foot using the acceleration and angular velocity included in the sensor data, and detects maximal values and minimal values from the time-series data of the orientation angle; and a determination unit for determining the walk cycle based on the sequence of the maximal values and the minimal values.