Torso Angle indicates in degrees how much the chest (i.e. torso) is tilted upward relative to gravity. The sensor should be affixed along the sternum with an adhesive.
Torso Angle is similar in concept to Pelvic Angle, and indicates the angle of the sternum relative to gravity. Generally speaking, Torso Angle decreases when riding in an aero position (upper body angled toward the ground), and increases when riding in a more upright position.
Intentional form change is not the only factor that affects Torso Angle; slight changes due to the influences of power, fatigue, and other factors also affect Torso Angle. For instance, when doing two-minute intervals, Torso Angle is likely to change since it will be difficult to keep a stable chest position as fatigue sets in.
The Torso Angle indicates the angle of the chest relative to gravity; sitting with the chest perpendicular to gravity will yield a 90° value, and a 0° value indicates that the chest is parallel to gravity.
Range: 0° (parallel to gravity) – 90.0° (upright, perpendicular to gravity)