EXERCISE RECOGNITION METHOD, EXERCISE RECOGNITION PROGRAM, AND INFORMATION PROCESSING DEVICE

A recognition device acquires skeleton information of a subject in a time series manner. The recognition device estimates a region where a specific joint is positioned using position information of a first joint group of a plurality of joints included in each piece of the time-series skeleton information. The recognition device estimates a region where a specific joint is positioned using position information of a second joint group that includes the specific joint and is a part of the first joint group of the plurality of joints included in each piece of the time-series skeleton information. The recognition device determines the region where the specific joint is positioned on the basis of each estimation result. The recognition device recognizes a motion of the subject using the time-series skeleton information and the determined region where the specific joint is positioned and outputs a recognition result.