Power Duration Curve (PDC) Fully Explained: Use Data to Find Your Weaknesses

What Is the Power Duration Curve?

The Power Duration Curve (PDC) plots the maximum power you can sustain over different time durations, from 1 second to several hours. It is your complete ability fingerprint as a cyclist—describing your capabilities more comprehensively than any single metric (FTP, VO2max, peak power).

How to Build Your PDC

Data Sources:

• At least 4–6 weeks of power meter riding data
• Include different ride types (short climbs, long climbs, flats, interval training)
• Ideally include several near-maximal efforts

Recommended Tools (free):

• intervals.icu: Automatically generates PDC, supports multi-period comparison
• Golden Cheetah: Open-source software with powerful PDC analysis
• Strava (requires Summit subscription): Basic Power Curve feature

Key PDC Time Durations and Corresponding Abilities

Duration	Corresponding Ability	Energy System	Real-World Application
1–5 sec	Neuromuscular Power (NMP)	Phosphocreatine System	Starting acceleration, short sprints
5–15 sec	Peak Anaerobic Power	Phosphocreatine + Glycolysis	Finish sprint, position fighting
30 sec–1 min	Anaerobic Capacity (AC)	Glycolytic System	Short climb sprint, breakaway
1–3 min	Maximal Aerobic Power (MAP)	Glycolysis + Aerobic	Medium climbs, chasing back to the group
3–8 min	VO2max Power	Primarily Aerobic	Long climbs, time trial segments
8–20 min	Above Anaerobic Threshold	Aerobic + Threshold	Rolling terrain, medium-distance time trials
20–60 min	Threshold Power (FTP/CP)	Aerobic Threshold	Long time trials, climbing races
60–180 min	Sustained Power	Aerobic Endurance	Long road races, Grand Tours

Four Typical PDC Profiles

Type 1: Sprinter

Characteristics: High on the left, low on the right; outstanding short-duration power, relatively weak long-duration power
1 sec: > 1400W
5 sec: > 1100W
1 min: > 650W
5 min: 350W (relatively low)
20 min: 280W (relatively low)

Strengths: Finish sprint, short-distance acceleration
Weaknesses: Long climbs, sustained high-power output
Signature Events: Criteriums, flat road races

Type 2: Climber

Characteristics: Low on the left, high on the right (relative to body weight); outstanding long-duration power
1 sec: 900W
5 sec: 750W
1 min: 500W
5 min: 380W (outstanding)
20 min: 340W (outstanding)
60 min: 320W (outstanding)

Strengths: Long climbs, steady output, high W/kg
Weaknesses: Sprinting, short-distance acceleration, solo riding on flats
Signature Events: Mountain races, Taiwan KOM

Type 3: Time Trialist

Characteristics: Middle durations (5–20 min) particularly outstanding
5 min: 400W
20 min: 350W
60 min: 330W

Strengths: Individual time trials, long-duration steady output
Weaknesses: Surge attacks, short-distance explosiveness
Signature Events: Individual time trials, triathlon

Type 4: All-Rounder

Characteristics: Balanced across all durations, no obvious strengths or weaknesses

Strengths: Adapts to various race situations
Weaknesses: Not the strongest in any single aspect
Signature Events: Stage races, amateur road races

How to Find Your Weaknesses

Method 1: Compare Against Reference Benchmarks

Below are PDC reference values for different rider levels (male, W/kg):

Duration	Beginner	Amateur	Advanced Amateur	Elite
5 sec	10–13	14–17	17–20	20–24
1 min	5–6.5	6.5–8	8–9.5	9.5–11
5 min	3.2–3.8	3.8–4.5	4.5–5.2	5.2–6.0
20 min	2.8–3.3	3.3–3.9	3.9–4.6	4.6–5.5
60 min	2.5–3.0	3.0–3.6	3.6–4.2	4.2–5.0

Plug your data into this table and identify the durations that fall clearly below your level—those are your weaknesses.

Method 2: PDC Slope Analysis

Observe the slope of decline in your PDC across different durations:

• Slope too steep in the 1–5 min segment: Insufficient VO2max capacity; the aerobic system cannot sustain high power
• Slope too steep in the 5–20 min segment: Threshold ability is the weakness; lactate clearance is insufficient
• Slope too steep in the 20–60 min segment: Insufficient endurance; glycogen management and fat oxidation need improvement
• Sharp decline in the 60+ min segment: Long-distance endurance (possibly also fueling strategy) issues

Method 3: Duration Ratio Analysis

Ratio	Calculation	Normal Range	Lower Value Indicates
FTP/MAP	20-min power / 5-min power	0.78–0.85	Relatively weak threshold ability
MAP/AC	5-min power / 1-min power	0.65–0.75	Relatively weak VO2max ability
AC/NMP	1-min power / 5-sec power	0.50–0.60	Weak anaerobic sustainability
60 min/20 min	60-min / 20-min power	0.88–0.95	Relatively weak endurance

Training Prescriptions for Weaknesses

Weakness: Short-Duration Power (< 1 min)

Training Prescription:
  1. Starting sprints: 10 × 10 sec all-out (full recovery 3–5 min)
  2. 30-sec all-out intervals: 6–8 × 30 sec (recovery 4 min)
  3. Strength training: squats, leg press, 2× per week
  4. Big-gear low-cadence sprints: 8 × 15 sec (accelerate from 50–60 rpm)

Frequency: 2× per week for 4–6 weeks
Expected Improvement: 5-sec power up 5–10%

Weakness: VO2max Duration (1–5 min)

Training Prescription:
  1. Classic VO2max intervals: 5 × 3–4 min @ 110–120% FTP
  2. Micro-intervals: 3 sets × 12 reps of 30/15
  3. Hill repeats: choose a 3–5 min short climb, repeat 4–6 times all-out
  4. Progressive intervals: 3 min @ 105% → 2 min @ 115% → 1 min all-out

Frequency: 2× per week for 6–8 weeks
Expected Improvement: 5-min power up 3–8%

Weakness: Threshold Duration (5-20 minutes)

Training Prescription:
  1. Threshold Cruise: 2-3 × 15-20 minutes @ 95-100% FTP
  2. Over-Under: 5 × (2 minutes @ 105% + 3 minutes @ 90%)
  3. SST (Sweet Spot Tempo): 2 × 30 minutes @ 88-93% FTP
  4. Step-Up Threshold: 10 minutes @ 90% → 10 minutes @ 95% → 10 minutes @ 100%

Frequency: 2-3 times per week for 6-8 weeks
Expected Improvement: 3-6% increase in 20-minute power

Weakness: Endurance Duration (> 60 minutes)

Training Prescription:
  1. Long Ride: 1 × 3-5 hours Zone 1-2 per week
  2. Tempo Long Block: 1 × 60-90 minutes @ 76-85% FTP
  3. Long Threshold: 1 × 40-50 minutes @ 88-92% FTP (once every two weeks)
  4. Nutrition Training: Practice race-day fueling strategies during long rides

Frequency: Focus on weekend long rides for 8-12 weeks
Expected Improvement: 2-5% increase in 60-minute power

Advanced Applications of the PDC

Time-Series Analysis: Tracking Progress

Overlaying PDCs from different months on the same chart makes it clear:

• Which durations have improved
• Whether the magnitude of improvement matches your training focus
• Whether there are unexpected declines (which may be early signs of overtraining)

Event Demand Analysis

Analyze the power demands of your target event and compare them against your PDC:

Event Type	Key Duration	PDC Requirement
Fengguizui Time Trial	25-35 minutes	Strong threshold power
Taiwan KOM	180-240 minutes	Strong endurance power
Criterium	30 seconds + 5 minutes + threshold	Well-rounded with no obvious weaknesses
Team Time Trial	1-5 minute rotations	Strong MAP and AC

PDC Requirements for Classic Taiwan Routes

Route	Estimated Time	Key Power Duration	Main Challenge
Fengguizui (Xizhi side)	25-40 minutes	Threshold (20-40 minutes)	Steady gradient, pacing control
Yangmingshan (Yangde Boulevard)	20-30 minutes	Threshold (20-30 minutes)	Steeper early section requires control
Wuling (East approach)	150-240 minutes	Endurance (2-4 hours)	Extremely long sustained output
Buyan Pavilion	15-25 minutes	MAP + Threshold	Steep final section requires explosive power
County Road 136	45-75 minutes	Threshold + Endurance	Pacing management on rolling terrain

Common Misconceptions

1. The PDC is only accurate with all-out testing: Not entirely true. 4-6 weeks of everyday riding data can typically build a PDC that is 80% accurate; all-out testing can fill in the remaining 20%.

2. All durations should be improved equally: Not necessary. Based on your race demands and weaknesses, choose 1-2 durations to focus on improving.

3. The PDC only goes down, never up: Theoretically, the PDC represents the maximum value across all durations, so it should only rise. However, if you use a rolling time window (e.g., the last 6 weeks), the PDC will indeed fluctuate up and down due to form variations.

Conclusion

The PDC is the most underrated analytical tool in power-based training. A single FTP number tells you “where your threshold is,” but the PDC tells you “what kind of rider you are, where your weaknesses lie, and how you should improve.” Take the time to learn how to interpret your PDC, and it will become your most valuable training decision-making tool.

Related Reading

• The Complete Guide to the Power Duration Curve: Understanding Your Strengths and Weaknesses from Your Power Curve
• Interpreting Your Cycling Power Curve: The Training Significance of Power Output at Different Durations
• Power Curve Interpretation: Finding Your Weak Zones
• Advanced Power Training: A Complete Interpretation from Zone Analysis to the PDC Curve