An exercise support device includes a sensor section which obtains motion data related with a user's body motion while exercising, and a data processing section which identifies whether the motion data obtained by the sensor section are related to first motion of swinging the right foot toward a traveling direction or related to second motion of swinging the left foot toward the traveling direction, and obtains, from the motion data, first exercise data related to the first motion and second exercise data related to the second motion. The data processing section analyzes the user's body motion based on comparison between the user's exercise form and the exercise status based on the first exercise data and the user's exercise form and the exercise status based on the second exercise data.