MOTION PERFORMANCE INDICATORS

Dead Spot Score

The Dead Spot Score (DSS) pinpoints locations and magnitudes where pedaling velocities lack smoothness along the left and right pedaling cycle.

Foot Angular Range (Foot AR)

Foot Angular Range measures how much the heel moves up and down while pedaling. Looking at the right and left Foot Angular Range values provides insight to left/right movement imbalances.

Foot Angular Range (Q1)

Foot Angular Range (Q1) shows the Foot Angular Range of the first quadrant of the pedaling cycle (12 o’clock to 3 o’clock position). Looking at the right and left Foot AR (Q1) values provides insight to left/right movement imbalances.

Leg Angular Range

Leg Angular Range measures how much the thighs move up and down while pedaling. Looking at right and left Leg Angular Range values provides insight to left/right movement imbalances.

Pelvic Rotation

Using the sacrum (the large vertebra at the bottom of the spine) as an anchor point, Pelvic Rotation measures the average clockwise and counter-clockwise rotation of the pelvis according to the sensor's top-to-bottom axis (please see image). The top of the axis extends toward the rider's head, and the bottom of the axis extends towards the tail of the saddle.

Pelvic Rock

Using the sacrum (the large vertebra at the bottom of the spine) as an anchor point, Pelvic Rock measures the average top-down range of movement of the pelvis along the pelvis' front-to-back axis. The front of the axis extends towards the rider's stomach and the back of the axis projects from the sacrum.

Pelvic Angle

Using the sacrum (the large vertebra at the bottom of the spine) as an anchor point, Pelvic Angle measures the angle of the pelvis relative to gravity. Range: 0° (parallel to ground) - 90° (sitting upright)

Torso Rotation

Torso Rotation is the average angular rotational range of the chest, measured at the sternum once per second. This measurement is dependent on the torso’s rotational axis, which closely parallels the spine: when sitting up, the spine/rotational axis will be vertical (perpendicular to the ground), and when in riding position, the spine/rotational axis will tilt toward the handlebars.

Torso Rock

Torso Rock represents the average angular rotational range of the torso, measured at the sternum once per second along the local sagittal axis (the sagittal axis intersects the lower back and the abdomen area above the pelvis).

Torso Angle

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.