The Science of Pacing in Cycling Hill Climbs: Calculating Optimal Race Power Targets from FTP

Introduction

Pacing mistakes in climbing races are the most common and most regrettable performance killers. Going out too hard at the start, you feel the sting of lactate buildup midway through the race; then you blow up in the final stretch, watching rider after rider pass you while you can only grind your way to the finish. Almost every participant has experienced this pain, and the solution is a power meter and scientific pacing.

Power (Watts) is the most objective metric for measuring riding intensity, unaffected by temperature, fatigue, or emotion. Through an FTP (Functional Threshold Power) test, you can build a personalized pacing system that lets you finish every climbing race as close to your best possible performance as possible.

FTP Testing and Training Zone Setup

FTP is defined as the highest average power you can sustain for approximately 60 minutes. For most amateur riders, there are several practical methods for testing FTP:

After testing, set up seven training zones based on FTP:

• Zone 1 (Recovery): < 55% FTP
• Zone 2 (Endurance): 56–75% FTP
• Zone 3 (Tempo): 76–90% FTP
• Zone 4 (Threshold): 91–105% FTP
• Zone 5 (VO2 Max): 106–120% FTP
• Zone 6 (Anaerobic Capacity): 121–150% FTP
• Zone 7 (Neuromuscular): > 150% FTP

Setting Power Targets for Climbing Races

Set target power based on race distance

Power targets for climbing races should be adjusted according to estimated finish time. Here are general principles:

• Climbing races under 30 minutes: Target 110–120% FTP (Zone 5)
• Climbing races of 30–60 minutes: Target 95–105% FTP (high Zone 4)
• Climbing races of 1–2 hours: Target 88–95% FTP (Zone 4)
• Climbing races of 2–4 hours: Target 80–88% FTP (Zone 3–4 boundary)
• Over 4 hours (e.g., KOM): Target 75–82% FTP (Zone 3)

Power strategy examples for major climbing races in Taiwan

Take the full Wuling course (approximately 50 km, finish time 3.5–5 hours) as an example: set a target power of 75–82% FTP. If your FTP is 220W, your target power is 165–180W.

Segment strategy:

• First 25 km (below 1,000 m elevation): Stay conservative below 175W, establish a rhythm, and avoid lactate accumulation
• Middle 25–40 km (1,000–2,000 m elevation): Maintain 170W, feel your breathing rhythm, and drop to 160W if necessary
• Final 40–50 km (2,000–3,275 m elevation): Power naturally declines at high altitude; use RPE 7–8 (rating of perceived exertion scale 1–10) as the pacing guide rather than forcing a fixed power target

Power Correction at High Altitude

KOM events in Taiwan often involve high-altitude sections, which significantly affect power output:

• 1,000 m elevation: Power decreases by approximately 3–4%
• 2,000 m elevation: Power decreases by approximately 7–8%
• 3,000 m elevation: Power decreases by approximately 12–15%

This means that on the upper sections of Wuling, even if your perceived effort remains unchanged, your actual power output will be 12–15% lower than at sea level. This is a normal physiological response—there is no need to force higher output. Instead, switch to using RPE (rating of perceived exertion) as your pacing guide.

Practical Recommendations

1. Calibrate your power meter before the race: Temperature changes can affect power meter readings. Perform a zero offset calibration before starting on race day.
2. Set a power ceiling alert: Set an alert on your Garmin or Wahoo for when power exceeds your target. The first half is especially prone to over-powering due to excitement.
3. Combine heart rate data: Monitor power and heart rate together. If heart rate is abnormally high at the same power output (more than 10 bpm above normal), it could be a sign of dehydration or illness.
4. Prepare a Plan B: If you accidentally go over power in the early stages, you will need to proactively reduce power by 5–10% in the later stages as a “rescue pacing” strategy—far better than completely blowing up.
5. Build a training data archive: After each race, upload your power data to TrainingPeaks or Intervals.icu to build a personal database that serves as the basis for setting targets in your next event.

Conclusion

The essence of scientific pacing is an honest understanding of your own abilities. When you know your FTP accurately, understand how high altitude affects power, and strictly execute your pacing plan during a race, a climbing race transforms from a battle of willpower into a technical performance. Every race refines your understanding of your own body, and this process itself is one of the most fascinating charms of climbing races.

Related Reading

• How to Effectively Improve FTP: From Testing to Practical Training Plans
• Olympic-Distance Triathlon 40 km Bike FTP Training Plan Design: The Key to Consistent Output
• Cycling FTP Training Methods: 7 Core Workouts to Raise Threshold Power
• Time Trial (TT) Power Pacing: Why TT Pacing Is Not FTP × 100%