Sweet Spot Training: An Efficient Method at 88–93% of FTP

Introduction

If you only have 8–12 hours per week to train, Sweet Spot training may be the most effective way to boost your FTP. This specific zone, sitting between 88–93% of FTP, is described by top coaches like Frank Tschopp as the “zone with the highest training efficiency” because it is “hard enough, but won’t leave you overtrained.”

This article will break down the science behind Sweet Spot, workout design, and how to incorporate it into daily training on Taiwan routes such as Yangjin Highway and Beiyi Highway.

The Science Behind Sweet Spot

What makes Sweet Spot special is that it sits at the intersection of two training benefits:

Physiological mechanisms:

• The intensity is high enough to effectively stimulate mitochondrial biogenesis and increased capillary density
• The intensity is not so high that lactate clearance becomes insufficient to sustain longer efforts (20–60 minutes)
• It accumulates more effective training volume (Training Volume at High Intensity) than pure Z5 interval training

Recovery characteristics:

• Compared to Z5 VO2max training, recovery time after Sweet Spot is shorter (24–36 hours vs 48–72 hours)
• It can be performed 2–3 times per week, significantly increasing total training stimulus

Sweet Spot Range Calculation

Classic Sweet Spot Workouts

Workout 1: 2×20 Minutes Beginner Version

Suitable for riders new to structured training:

• Warm-up: 15 minutes, progressing from Z1 to Z2
• Main set: 20 minutes @ 88–93% FTP + 5 minutes Z1 recovery + 20 minutes @ 88–93% FTP
• Cool-down: 10 minutes Z1
• Total time: Approximately 70 minutes

Workout 2: 3×15 Minutes Efficiency Version

A choice when time is limited:

• Warm-up: 10 minutes
• Main set: 3 sets × 15 minutes @ 90% FTP, with 4 minutes rest between sets
• Cool-down: 10 minutes
• Total time: Approximately 75 minutes

Workout 3: 60+10 Advanced Version

A challenge for well-conditioned athletes:

• Warm-up: 15 minutes
• Main set: 60 continuous minutes @ 88% FTP, no rest in between
• Cool-down: 10 minutes
• Note: When you can complete this workout with ease, your FTP has typically already improved by about 5–10W

Taiwan Route Practice Guide

Yangjin Highway (Provincial Highway 2A) Yangmingshan Section:

• Approximately 8 km long with about 500 meters of climbing
• Mid-section grades of 5–7% are ideal for maintaining a steady Sweet Spot power output
• Suggestion: Don’t worry about speed; focus on sustaining 90% FTP power output

Beiyi Highway (Provincial Highway 9) Pinglin Section:

• Continuous climbing section of approximately 12–15 km
• Can plan a “2 out-and-back” Sweet Spot workout
• Recover in Z1 on descents, and enter Sweet Spot intensity on climbs

Notes:

• Outdoor riding power fluctuates significantly (red lights, descents); focus on average power and normalized power (NP)
• Aim for an NP-to-FTP ratio (IF = NP/FTP) between 0.88–0.93

Sweet Spot Training Periodization

Practical Tips

1. Use ERG mode: ERG mode on indoor trainers locks in your target power precisely, eliminating human-induced fluctuations
2. Monitor heart rate decoupling: If your heart rate spikes abnormally in the latter half of a 1-hour Sweet Spot ride, it indicates insufficient aerobic base
3. Pair with adequate carbohydrates: Sweet Spot intensity depletes large amounts of glycogen; aim to consume 40–60g of carbs every 45 minutes
4. Don’t do Sweet Spot every day: Intersperse Z2 recovery days throughout the week to fully realize training benefits
5. Record subjective fatigue after training: The gap between rating of perceived exertion (RPE) and power output can help assess your condition on any given day

Conclusion

The appeal of Sweet Spot training lies in its “sustainability”—it’s hard enough to make you progress, yet won’t leave you collapsed on the couch after every session. For Taiwanese amateur riders with limited time, 2–3 Sweet Spot workouts per week, combined with 1–2 long Z2 rides, is the golden combination for boosting FTP in the shortest time possible.

Related Reading

• Sweet Spot Training: The Golden Zone for Maximizing Training Efficiency in Limited Time
• Sweet Spot for Climbing Training: Maximizing Training Efficiency at 88–93% FTP
• Sweet Spot Training: The Best Choice for Time-Constrained Riders? An In-Depth Look at Pros and Cons
• Sweet Spot Training Fully Explained: The Most Efficient Endurance-Building Training Method