Dead Spot Scores (DSS) pinpoint the magnitude and locations where pedaling velocities lack smoothness along the left and right pedaling cycle.
- Lack of smoothness is a secondary symptom of sub-optimal pedaling motions.
- Looking at the right and left DSS values provides insight to left/right movement imbalances.
A “dead spot” is where pedaling power is lost when sub-optimally shifting from one movement pattern to another during a pedaling stroke (such as the shift between the power and recovery phase).
Optimal pedaling motions are smooth and apply less stress to the body than sub-optimal pedaling motions. DSS is measured by the foot’s angular velocity, where any deviation from a smooth angular velocity sine curve is considered a dead spot. Each dead spot is represented along the pedaling cycle by a filled circle, and a circle’s size indicates the magnitude of deviation.
Since dead spots are caused by many factors, a trained coach must find the primary cause of a high DSS. One known cause of a high DSS is the overuse of less powerful secondary muscles (such as hamstrings) over larger primary muscles (such as the glutes).
The center value shows the total sum of magnitudes (measured in degrees/sec) of the dead spots that occurred in a single pedaling cycle. Each dead spot is represented along the pedaling stroke, with the size showing the magnitude of deviation from a smooth angular velocity.
Range: 0.0 (none) - 40.0 (high number of DSS)