Pa:HR Drift Calculator

Pa:HR (Power-to-Heart Rate ratio drift) is a valuable metric used to assess aerobic efficiency during steady-state endurance efforts.

🧪 Protocol Steps

• Warm-Up: 10–15 minutes of easy spinning, gradually building to Zone 2 intensity.
• Test Effort: Ride for at least 45–60 minutes at a steady Zone 2 power. Keep cadence and terrain consistent.
• Data Collection: Split the ride into two halves and record the average Power and Heart Rate for each half.
• Enter your values below to calculate your drift percentage and receive feedback.