AI-built cycling FTP intervals plan
12 weeks to improve your FTP +20-30 W. EntrenAI structures sweet spot + threshold + VO2max per Coggan's 7 zones, with Friel periodization and 20-min FTP test every 6 weeks. Power meter required. For intermediate cyclists with solid aerobic base.
Updated
What is a cycling FTP intervals plan?
The cycling FTP intervals plan is designed to improve your FTP (Functional Threshold Power) — the maximum sustainable wattage for 1 hour — by +20-30 W in 12 weeks. FTP is the key cycling performance metric: it determines your ability to hold speed on flats, long climbs and time trials.
The plan is based on Coggan's 7 power zones:
- Z1 (Recovery): <55 % FTP — regenerative spin
- Z2 (Endurance): 56-75 % FTP — aerobic base
- Z3 (Tempo): 76-90 % FTP — between Z2 and threshold
- Z4 (Threshold): 91-105 % FTP — at the lactate limit
- Z5 (VO2max): 106-120 % FTP — maximum aerobic capacity
- Z6 (Anaerobic): 121-150 % FTP — anaerobic capacity
- Z7 (Sprint): >150 % FTP — neuromuscular power
To improve FTP, the plan works mainly on Sweet Spot (88-94 % FTP) + Threshold (95-105 % FTP) + VO2max (106-120 % FTP), with solid Z2 base.
The methodology blends Friel principles (block periodization) + Seiler research (80/20 polarized distribution) + Coggan (precise zones).
Your power zones, in the watts of your FTP
The FTP intervals plan writes every session as a percentage of FTP, and the app turns it into watts with your latest test. These are the six zones for three FTPs common in this plan; the trainer paints them on screen and the head unit warns you when you drift.
| Zone | % FTP | FTP 220 W | FTP 260 W | FTP 300 W | What it trains |
|---|---|---|---|---|---|
| Z1 | 0-55 % | 0-121 W | 0-143 W | 0-165 W | Active recovery |
| Z2 | 56-75 % | 123-165 W | 146-195 W | 168-225 W | Endurance: the base |
| Z3 | 76-90 % | 167-198 W | 198-234 W | 228-270 W | Tempo and sweet spot |
| Z4 | 91-105 % | 200-231 W | 237-273 W | 273-315 W | Threshold (FTP) |
| Z5 | 106-120 % | 233-264 W | 276-312 W | 318-360 W | VO2max |
| Z6 | 121-150 % | 266-330 W | 315-390 W | 363-450 W | Anaerobic capacity |
Your AI-generated plan
1. MANDATORY initial validation.
- Power meter installed and calibrated (Garmin Rally pedals, Favero Assioma, Power2Max chainring, Stages crank, etc.)
- 6+ months regular cycling (>5 hours/week minimum)
- Initial FTP test completed (20-min test × 0.95 = estimated FTP)
- Capacity to pedal 90 min Z2 comfortably without issue
Without power meter, plan unviable — use beginner cycling plan or gran fondo.
2. 20-minute FTP test. Before starting:
- 20 min Z2 warm-up + 3×1 min Z4-Z5 with 1 min Z2 + 5 min Z2
- 20 min sustained max (don't accelerate at end, consistent pace)
- 10 min cool-down
- FTP = 20-min average power × 0.95
Repeat every 6 weeks to recalibrate zones.
3. 4-phase periodization (12 weeks):
- Reinforced base (3 wk): elevated Z2 volume + 1 Sweet Spot session/week
- Build (4 wk): Threshold + VO2max appear, Z2 base maintained
- Specific (4 wk): concentrated VO2max + Threshold block with less Z2
- Test + deload (1 wk): FTP retest + deload -50 % volume
4. Typical weekly structure (5 sessions, intermediate):
- Monday - Short Z2 (60-75 min active recovery)
- Tuesday - Sweet Spot (90 min with 2-3×15 min @ 88-92 % FTP)
- Wednesday - Medium Z2 (60-90 min) or rest
- Thursday - Threshold or VO2max (75-90 min with specific intervals)
- Friday - Rest or mobility
- Saturday - Long ride (2.5-4 h Z2 with embedded Sweet Spot block)
- Sunday - Recovery (45 min Z1-Z2 very gentle)
5. Key sessions:
Sweet Spot (88-94 % FTP). Sweet spot is the zone with best stimulus/fatigue ratio for FTP improvement. More sustainable than Threshold, more stimulating than Z3. EntrenAI prescribes progression:
- Wk 1-2: 3×10 min Sweet Spot (30 min total)
- Wk 3-4: 3×15 min (45 min total)
- Wk 5-6: 2×20 min (40 min total)
- Wk 7-8: 1×40 min continuous Sweet Spot (key session)
Threshold (95-105 % FTP). Work at the lactate limit. High demand, 48 h recovery.
- Typical scheme: 2×20 min @ 100 % FTP with 8 min Z2 between sets
- Variation: 4×8 min @ 105 % FTP with 4 min Z2 between
VO2max (106-120 % FTP). Maximum cardiopulmonary stimulus, fundamental for raising aerobic ceiling:
- 5×3 min @ 115 % FTP with 3 min Z2 between sets
- 6×4 min @ 110 % FTP with 4 min Z2
6. Critical rules:
- Z2 never <60 % of total volume (aerobic base protects adaptations)
- NEVER 2 consecutive quality days (Sweet Spot, Threshold, VO2max). Minimum 48 h between intense sessions.
- FTP test every 6 weeks to recalibrate zones (don't train with outdated FTP >8 wk)
The sessions that define this plan, block by block
Width = minutes, height = intensity relative to FTP (red line). This is how you will see each session in the app before getting on the bike: you know how long each block lasts, at what watts, and how much you rest.
- Z2
- Z3
- Z4
- Z5
- Z6
Who is this plan for?
- Intermediate FTP improvement. Current FTP 200-280 W (75 kg male) or 150-220 W (60 kg female). 12-week plan. Typical result: +20-30 W FTP (10-15 % improvement).
- Gran fondo prep. Focused on 100-160 km event and need higher FTP for better climbing. 14-week plan combines FTP intervals + progressive long rides.
- Olympic/70.3 triathlete needing bike improvement. 8-10-week FTP plan as specific block before triathlon plan. After FTP plan, transition to triathlon plan with new FTP.
Current FTP <180 W (male) or <130 W (female)? Your priority is aerobic base first — use beginner plan or beginner gran fondo. Without solid base, FTP intervals plan saturates without real progression.
Hours and TSS across the 12 weeks
From 6 to 10 hours a week, with a deload every fourth week and 1 taper week. The thin bar is the long ride, which reaches 3 h. TSS (training load) climbs from 330 to 550 per week.
- Base
- Build
- Specific
- Taper
- Deload
- Long ride
Your first weeks, in detail
Week 5
Build — first Threshold block + FTP retest in 1 week| Day | Session type | Detail | Duration |
|---|---|---|---|
| Monday - Short Z2 | Active recovery | 60 min Z2 (65-72 % FTP) at natural cadence 85-95 rpm. No efforts. | 60 min |
| Tuesday - Sweet Spot 3×15 min | Main quality of the week | 15 min Z2 warm-up. **3×15 min @ 88-92 % FTP (Sweet Spot)** with 5 min Z2 between sets. 10 min cool-down. Total ~85 min, 45 min Sweet Spot. | 85 min |
| Wednesday - Medium Z2 | Aerobic volume | 75 min Z2 (68-72 % FTP). Cadence 88-92 rpm. Normal hydration, 1 gel if >75 min. | 75 min |
| Thursday - Threshold 2×20 min | Threshold quality | 15 min Z2 warm-up + 3×1 min Z4 with 1 min Z2. **2×20 min @ 98-102 % FTP (Threshold)** with 8 min Z2 between sets. 10 min cool-down. Very demanding session — recovery important after. | 85 min |
| Friday - Rest | Mandatory recovery | Full rest or 30 min mobility. | — |
| Saturday - Long ride with Sweet Spot | Volume + embedded quality | **Long ride 3 hours with 2×15 min Sweet Spot** intercalated (one in hour 1, another in hour 2). Hydration every 20 min, 60-90 g carbs/h. Block-defining session. | 180 min |
| Sunday - Recovery | Z1 very gentle | 45 min Z1 (<60 % FTP) on flat. High cadence 95-100 rpm for drainage. | 45 min |
Week 9
Specific — concentrated VO2max block, FTP recalibrated| Day | Session type | Detail | Duration |
|---|---|---|---|
| Monday - Short Z2 recovery | Active | 60 min Z2 comfortable. After Thursday's VO2max, important recovery. | 60 min |
| Tuesday - VO2max 5×3 min | VO2max quality | 20 min Z2 warm-up + 3×30s @ Z5 (activation) + 5 min Z2. **5×3 min @ 115 % FTP (VO2max)** with 3 min Z2 between sets. 15 min extended cool-down (VO2max recovery is slow). Most demanding session of the plan. | 75 min |
| Wednesday - Medium Z2 | Recovery volume | 75 min Z2 conversational. Cadence 90-95 rpm. NO efforts. | 75 min |
| Thursday - Threshold 4×8 min | Threshold volume | 15 min warm-up + 3×30s Z5 with 30s Z2 + 5 min Z2. **4×8 min @ 102-105 % FTP (upper Threshold)** with 4 min Z2 between sets. 10 min cool-down. | 75 min |
| Friday - Mobility or rest | Pre-long ride recovery | Rest or 30 min mobility. | 0-30 min |
| Saturday - Long ride with VO2max block | Volume + stimulus | **Long ride 2.5 hours with 4×4 min @ 110 % FTP** intercalated at hours 1 and 2. Nutrition 80-90 g carbs/h. | 150 min |
| Sunday - Recovery | Z1 regenerative | 45 min Z1 very gentle. | 45 min |
These examples are real extracts from the EntrenAI planning engine. Your personal plan adjusts to your level, equipment and availability.
Equipment needed
EntrenAI automatically substitutes any exercise if you don’t have the gear.
- Road or triathlon bike with power meter (Favero Assioma, Garmin Rally, Stages, Power2Max, Quarq)
- Bike computer with ANT+/BLE (Garmin Edge 530+, Wahoo ELEMNT, Hammerhead Karoo)
- Chest HR strap (cross-check power/HR, detects cardiac drift)
- Smart trainer (Tacx Neo, Wahoo KICKR, Elite Direto) if you want to train indoors
- Zwift, Rouvy or TrainerRoad subscription (optional but useful)
- Aero helmet for tests + events
- Bottles (minimum 2 for sessions >90 min)
- Gels + isotonic tested in at least 4 long sessions
- Hydration belt or frame bag for long rides
What most people get wrong (and how to avoid it)
- 1
Training with outdated FTP
If your real FTP went from 240 W to 265 W but you keep training with 240 W base, all zones are 10 % low — sweet spot is really Z3, threshold is really sweet spot. Without correct stimulus, no progress. FTP test every 6 weeks minimum.
- 2
Doing 5-6 quality sessions/week
More is NOT better. 2-3 quality sessions (Sweet Spot, Threshold, VO2max) per week is the limit — more accumulates fatigue compressing adaptation. EntrenAI never prescribes 2 consecutive quality days.
- 3
Skipping Saturday long ride
Long ride consolidates aerobic base that allows FTP progression. Only intervals without Z2 volume = improvements 4-6 wk then guaranteed plateau. Minimum 1 long ride/week >2 hours.
- 4
Ignoring accumulated fatigue
Resting HR +5 bpm, heavy leg sensation, deteriorated sleep: overtraining signals. EntrenAI integrates biofeedback (sleep, HRV if you have Whoop/Oura/Polar) and auto-deloads when excess detected. Ignoring = injury / illness.
- 5
Doing Threshold when you should do Sweet Spot
Threshold (>95 % FTP) is 2-3× more stressful than Sweet Spot per equal duration. For FTP improvement, sweet spot has better stimulus/fatigue ratio. EntrenAI prioritizes Sweet Spot in base/build blocks, Threshold only in specific blocks.
- 6
Training without enough fuel
60+ min Threshold session fasted = guaranteed glycogen depletion + ruined session. For quality sessions, **80-100 g carbs in previous 2 h** + 30-60 g/h during. Without fuel, you don't stimulate power adaptations.
- 7
Changing planned sessions on whim
FTP plan requires consistency. Changing 'because I feel like more Z2 today' breaks progression. EntrenAI adjusts plan based on real biofeedback (fatigue, sleep), not instant motivation. Lacking motivation? Plan isn't the problem.
- 8
Only training within strict zones
Coggan zones are guides, not rigid grids. ±3 W from zone is acceptable. Pretending to pedal EXACTLY at 245 W (not 244 nor 246) is counterproductive — natural muscle fatigue varies power. Set average is what counts.
Other Cycling plan variants
Back to the general Cycling plan
- AI-built beginner cycling planBeginner cycling plan: build an aerobic base from scratch, learn bike position and nutrition, and ride your first 60 km in 12 weeks at 3-4 rides a week.
- AI-built gran fondo cycling planGran fondo cycling plan for 100-160 km in 14-18 weeks: sweet spot at 88-94% FTP, long rides building to 4-6 hours and fueling at 60-90 g of carbs an hour.
- AI-built road cycling planRoad cycling plan for amateur riders with a 6-10 hour weekly base: FTP intervals, sweet spot at 88-94% FTP, climbing and long rides over 12-16 weeks.
- AI-built indoor cycling plan with ZwiftIndoor cycling plan for Zwift, TrainerRoad or Rouvy: 4-5 short ERG-mode sessions a week with sweet spot and FTP intervals. 12 weeks, ideal for winter.
Frequently asked questions
Typical intermediate: +15-25 W (8-12 % improvement). Advanced with high FTP: +5-15 W (4-7 % improvement). Beginner with low FTP: +25-40 W (15-20 %). Rule: the higher your FTP base, the lower the absolute possible improvement percentage.
20 min × 0.95 test is the standard (Coggan/Friel). Pure 60 min test is more precise but brutally demanding — few endure it. 8 min ramp test (FTP = 8-min power × 0.90) is fast alternative. Any works if done consistently.
Trainer is PERFECT for quality sessions (sweet spot, threshold, VO2max) — no traffic, lights, wind. Road is needed for long rides + real feel. Optimal mix: 60 % trainer (quality) + 40 % road (volume, technique).
2×20 min @ 100 % FTP demands RPE 9-10 with correct loads? Your FTP is overestimated. Recalibrate: drop FTP base 5 % and retrain. Still hard? Focus on Sweet Spot for 4-6 more weeks before returning to Threshold.
Yes, with managed interference. Max 2 running sessions/week if doing FTP intervals (Hickson 1980). Better: easy Z2 running 30-45 min on alternating days from intense cycling. NOT 2 intense cardio sessions same day. Better option for combo: hybrid plan.
Caffeine 200-300 mg pre-quality session: improves 2-4 % performance in intervals. Beta-alanine 3-5 g/day chronic: helps in sprints and short VO2max intervals. Sodium bicarbonate 0.3 g/kg pre-event: marginal, high digestive risk. Creatine low relevance in cycling (vs strength).
Goal is only cycling? FTP intervals + long rides plan is optimal. Cross-cardio (running, rowing) does NOT add value. But coming from hybrid plan or triathlon, keeping some Z2 running serves for weight management and mobility.
Indicators: stable FTP >320 W (75 kg male) or >240 W (60 kg female) for several months + 12-24 months with intermediate FTP intervals plan. Advanced plan introduces concentrated VO2max blocks (5-7 VO2max sessions in 14 days) and long-duration sub-Threshold (1×60 min @ 95 % FTP).
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