W' Balance
In Vekta’s CP modeling, W′ represents the finite amount of work an athlete can perform above their Critical Power (CP) before reaching fatigue. Tracking W′ Balance helps athletes monitor high-intensity energy reserves, offering actionable insights for managing exertion.
How is W′ Balance Computed?
W′ Balance is calculated by tracking the depletion and reconstitution of W′ during a ride. When power output exceeds CP, W′ is depleted; when power drops below CP, W′ partially regenerates, depending on intensity and duration. Vekta’s algorithm updates W′ Balance continuously using real-time power data, providing a reliable estimate of an athlete’s anaerobic reserves throughout each ride.
Practical Uses of W′ Balance
W′ Balance can guide athletes in pacing and recovery, especially in sessions or events with frequent high-intensity efforts:
Gauge Recovery Needs: Track W′ depletion and adjust intensity for efficient recovery.
Plan Intervals: Structure intervals by allowing enough time for W′ to reconstitute, targeting anaerobic capacity development.
Optimize Race Strategy: Use W′ Balance to manage high-intensity efforts, timing critical surges when energy reserves are optimal.
Further Reading
Chorley, A., & Lamb, K. L.: The Application of Critical Power, the Work Capacity above Critical Power (W′), and Its Reconstitution: A Narrative Review of Current Evidence and Implications for Cycling Training Prescription.
Bartram, J. C., Thewlis, D., Martin, D. T., & Norton, K. I.: Validating an Adjustment to the Intermittent Critical Power Model for Elite Cyclists—Modeling W′ Balance During World Cup Team Pursuit Performances.