Sweet Spot Training for Cyclists: The Most Underrated Shortcut to a Higher FTP

Before long climbing events like Wuling, Dongjin, or the KOM Challenge, almost every amateur cyclist in Taiwan runs into the same problem: limited time, slow recovery, and a desire to boost FTP quickly. Threshold training is too painful, and Zone 2 feels too slow — this is where “Sweet Spot” becomes the most underrated yet highest-efficiency piece of the puzzle.

Sweet Spot was first systematized by Frank Overton (FasCat Coaching) in the mid-2000s, and later quantified further by Coggan and Hunter Allen in Training and Racing with a Power Meter. Its core value is that it trades intensity slightly below threshold for adaptation benefits noticeably higher than Tempo — while requiring 30-50% less recovery time than Threshold work, making it ideal for working professionals who can only train 6-10 hours a week.

What Is Sweet Spot?

Sweet Spot refers to the 88%-94% of FTP range (some coaches define it more loosely as 84-97%). Using Coggan’s 7-zone model, it spans the fuzzy territory from the upper edge of Zone 3 (Tempo) to the lower edge of Zone 4 (Threshold).

Why Is Sweet Spot Called the “Best Value” Zone?

A study published by Seiler in 2010 in Sportscience showed that intensities roughly 10% below threshold can stimulate mitochondrial biogenesis and capillary density at a lower perceived effort (RPE), without causing the 48-72 hours of deep fatigue typical of VO2max intervals. Internal data from FasCat Coaching also shows that amateur riders who did Sweet Spot work 3 times a week for 6 consecutive weeks saw an average FTP increase of 5-8%.

Its three main advantages are:

• High training stress per unit time (TSS/hour): One hour of Sweet Spot yields roughly 85-90 TSS, about 20% more than Tempo (70)
• Fast recovery: You can train again within 24 hours, unlike VO2 intervals that can wipe out your form for a whole week
• Longer cumulative duration: A single session can sustain 40-60 minutes of total volume, delivering far more stimulus time than Threshold work

Sample Sweet Spot Workouts

Below are three common Sweet Spot workouts of increasing difficulty. All can be done on Zwift, an indoor trainer, or outdoors (for outdoor riding, choose a climb of 8-15% gradient sustained for at least 6 minutes, such as Yangmingshan’s Yangde Boulevard, the Dongpu section of the New Central Cross-Island Highway, or Xiping Highway).

Beginner (1 hour)

• 15-minute warm-up (Zone 1-2)
• Main set: 3 x 10 minutes @ 90% FTP, with 5 minutes Zone 1 recovery between intervals
• 10-minute cool-down
• Total duration: 60 minutes, approx. 65 TSS

Advanced (1.5 hours)

• 15-minute warm-up
• Main set: 2 x 20 minutes @ 92% FTP, with 8 minutes recovery between intervals
• 10-minute cool-down
• Total duration: 90 minutes, approx. 95 TSS

Over-Under Workout

• 15-minute warm-up
• Main set: 3 x (15 minutes alternating 2 minutes @ 88% / 1 minute @ 95%)
• 5 minutes recovery between sets
• Total duration: 90 minutes, approx. 105 TSS

Weekly Periodization: How to Fit It Into Your Training Week

For an amateur rider training 8-10 hours per week, here is a suggested layout:

Practical Tips for Taiwanese Riders

1. Choose the right road: In the north, try Yangde Boulevard, Fengguizui, or Hsinchu’s Hengshan Sanfen Mountain; in central Taiwan, try Provincial Highway 89 (the Renzhiguan section heading west to Wuling); in the south, try Liugui to Baolai-Tengzhi. A gradient of 5-8% sustained for over 10 km is ideal.
2. Choose the right time: In summer, ride before 6:00 AM or after 6:00 PM to avoid heart-rate drift caused by temperatures above 35°C. If your heart rate runs 10 bpm higher than usual, drop down an intensity level.
3. Keep your cadence up: Sweet Spot work requires a cadence of 80-95 rpm. Too low, and it turns into pure strength training, shifting the adaptation in the wrong direction.
4. Pair with a power meter: Without a power meter, heart rate can serve as a backup, targeting 92-97% of LTHR — but be aware that heat and dehydration can drive heart rate artificially high.

Common Pitfalls

• Riding too much, too often: Sweet Spot is not a cure-all. After 8 consecutive weeks, you must schedule a 1-week deload, or you risk chronic overtraining.
• Drifting into Threshold: It’s tempting to push harder when the road feels good, ending up at 95-100% FTP — which doubles your recovery time.
• Skipping the warm-up: In winter, a 20-minute outdoor warm-up is recommended. Jumping straight into SST without one causes your heart rate to lag behind and your actual power output to appear inflated.

Conclusion

Sweet Spot isn’t flashy, and it doesn’t deliver the dramatic, rapid gains of VO2max intervals — but what it offers is steady progress you can repeat every week and accumulate every year. For Taiwanese amateur riders chasing a sub-4-hour Wuling climb, a KOM Challenge finish, or a PR on Provincial Highway 7A, it’s the most practical and repeatable shortcut to a higher FTP. Over the next 6-8 weeks, work SST into your trainer sessions and weekend long rides — the numbers will speak for themselves.

Related Reading

• Sweet Spot 訓練：有限時間內最大化訓練效益的黃金區間
• Sweet Spot 訓練：在 FTP 88–93% 的高效訓練法
• 爬坡訓練的 Sweet Spot：88–93% FTP 的訓練效益最大化
• 閾值功率的多維度提升：Sweet Spot以外的突破策略