Sweet Spot Training: The Most Efficient Way to Build Endurance
Sweet spot training is one of the most time-efficient ways to improve endurance. It targets a specific intensity zone where you get maximum training benefit with manageable fatigue.
What is Sweet Spot Training?
Sweet spot training sits between moderate and high intensity. It is typically defined as:
- ~84–94% of FTP (Functional Threshold Power)
- Upper Zone 3 / low Zone 4 (depending on system)
At this intensity, you push your aerobic system hard without accumulating excessive fatigue.
Why It Works
Sweet spot is effective because it balances:
- High training stimulus
- Sustainable effort
- Lower recovery cost compared to threshold training
You get close-to-threshold benefits without burning out.
How It Feels
- Controlled but demanding
- Breathing is deep but stable
- You can speak in short phrases, not full sentences
Example Workout
Warm-up: 10 min Z1–Z2 Main set: 3 × 10 min @ Sweet Spot Rest: 3 min Z1 Cool-down: 5–10 min easy
When to Use It
- Base phase
- Time-limited athletes
- Building aerobic capacity
Common Mistakes
- Going too hard (turning it into threshold)
- Too long intervals without experience
- Poor pacing
Sweet Spot vs Threshold
| Sweet Spot | Threshold |
|---|---|
| Sustainable | Very hard |
| Lower fatigue | High fatigue |
| More volume possible | Limited volume |
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