Table of Contents
Essential Power Data Fields
Power-based training requires real-time feedback on your effort. Understanding what each power data field shows helps you configure displays that actually improve your training.
Core Power Fields
| Field | What It Shows | Best Use |
|---|---|---|
| Power (3s) | 3-second rolling average | Primary training field |
| Power Zone | Current zone (1-7) | Zone-based workouts |
| Lap Power | Average for current lap/interval | Interval pacing |
| Normalized Power | Weighted average power | Variable terrain rides |
| Average Power | Simple average for ride | Steady-state efforts |
3-Second Power vs Instant Power
Instant power fluctuates wildly with each pedal stroke. A 3-second average smooths these fluctuations while remaining responsive enough to guide interval training. Some cyclists prefer 5-second or 10-second averages for even smoother displays, especially on climbs.
Before configuring power zones on your computer, calculate accurate zone boundaries using our FTP Calculator. Enter your most recent FTP test result to generate personalized zones.
Workout-Specific Profiles
Different workouts require different information. Create multiple activity profiles with data fields optimized for each training type.
Endurance Ride Profile
Focus on staying in Zone 2 and monitoring accumulated work.
- Main screen: Power Zone, HR, Duration, Distance
- Secondary: Avg Power, Normalized Power, TSS, Cadence
Interval Training Profile
Quick glance at interval performance and recovery.
- Main screen: Power (3s), Lap Power, Lap Time, HR
- Secondary: Power Zone, Cadence, Interval Count
Race Day Profile
Minimal distraction with key pacing information.
- Main screen: Power (3s), Elapsed Time, Distance to Go
- Secondary: Avg Power, IF, Speed, Cadence
Climbing Profile
Power sustainability on long climbs.
- Main screen: Power (10s), Gradient, Elevation Gain
- Secondary: VAM, Cadence, HR Zone, Time
Zone Display Configuration
Most cycling computers can display your current power zone numerically, graphically, or both. Configuring this correctly makes zone-based training intuitive.
Entering Custom Zones
After calculating your zones with an FTP calculator, enter these boundaries into your cycling computer through its companion app.
- Open your cycling computer's companion app (Garmin Connect, Wahoo, etc.)
- Navigate to user settings or training zones
- Select power zones configuration
- Enter your FTP value and zone percentages or enter custom zone boundaries directly
- Sync changes to your device
Visual Zone Indicators
Many computers offer color-coded power zone displays or gauge-style indicators. These provide instant visual feedback without requiring you to read numbers during hard efforts. Configure colors that make sense to you:
- Blue: Recovery and endurance (Zones 1-2)
- Green: Tempo (Zone 3)
- Yellow: Threshold (Zone 4)
- Orange: VO2max (Zone 5)
- Red: Anaerobic and neuromuscular (Zones 6-7)
Advanced Power Metrics
Beyond basic power display, these advanced metrics help you understand training load and pacing during longer rides.
Training Load Metrics
| Metric | Formula | Use |
|---|---|---|
| TSS | IF^2 x hours x 100 | Total training stress |
| IF | NP / FTP | Relative intensity |
| NP | Weighted power average | True effort on variable terrain |
| VI | NP / Avg Power | Power variability (pacing quality) |
Intensity Factor Guidelines
- IF < 0.75: Recovery or easy endurance
- IF 0.75-0.85: Tempo or steady aerobic
- IF 0.85-0.95: Threshold work
- IF 0.95-1.05: Hard race effort
- IF > 1.05: Time trial or short race
Recommended Screen Layouts
Balance comprehensive data with readability. Too many fields create visual clutter during hard efforts.
4-Field Layout (Recommended)
Ideal for most training. Large, readable fields with the most important metrics always visible.
6-Field Layout
More information with slightly smaller text. Good for longer steady rides.
8-Field Layout
Maximum data density. Best for post-workout analysis screens or flat steady rides.
Setting Up Training Alerts
Training alerts notify you when metrics drift outside target ranges. This keeps you honest during zone-specific workouts without constantly watching the screen.
Power Zone Alerts
Configure alerts for your target zone during structured workouts. Most computers allow setting upper and lower power boundaries with audio, visual, or vibration alerts when you exit the range.
Heart Rate Ceiling Alert
For endurance rides, set a heart rate ceiling alert at your Zone 2 upper limit. This prevents unconsciously drifting into higher intensities on long aerobic rides.
Cadence Range Alerts
Maintain optimal pedaling efficiency with cadence alerts. Common ranges are 85-95 RPM for most riding, with lower targets (70-80) for climbing drills.
Alert Tip: Start with fewer alerts and add more as needed. Too many notifications become distracting and get ignored. Focus on the one or two metrics most critical to your current training focus.