Train Smarter,
Not Just Harder

Lab-level diagnostics at home. Know your VO2max and VLamax.

Take the guessing out of your cycling training. Powertest tells you way more than your threshold – it reveals how it's composed and which training works best for YOU.

Advanced GPS tracking with Kalman filtering. Complete metabolic profile with race time predictions from 1.5 km to marathon.

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10k+ powertests completed
Trusted by 80+ coaches
First month free
Powertest on bike trainer
Track from above: GPS + Kalman filtering
Javier Sola

"With Afasteryou Powertest we can continuously and easily track the improvements and also have a good estimate of the need for carbohydrates depending on the intensity."

Javier Sola • Endurance Coach

Why Testing?

Nothing is more frustrating than training hard and not achieving your goals.

Traditional training methods use threshold or VO2max alone – but that's only half the story. With Powertest, you get the complete picture.

Average Performance Gain in 12 Months

Guessing Your Training Zones

Generic zones based only on threshold power miss your individual physiology.

Data-Driven Optimization

Know exactly how much volume and intensity YOU need based on YOUR VO2max and VLamax.

Track Real Progress

See concrete improvements in your key metrics, not just feel-good numbers.

Same Threshold, Completely Different Athletes

Meet two athletes with 300W threshold. One is a sprinter, one is an endurance rider. Powertest reveals why they need totally different training.

SPRINTER

300W Threshold • High VLamax

VO2max

VLamax

Threshold

FATmax

Best for: Criteriums, short climbs, explosive efforts

Needs: High intensity intervals, less base volume

MARATHONA

300W Threshold • Low VLamax

VO2max

VLamax

Threshold

FATmax

Best for: Gran Fondos, long climbs, endurance events

Needs: Sub-threshold work, larger base volume

The Point: Your threshold alone doesn't tell you how to train. VO2max and VLamax reveal your true athletic profile and unlock personalized training strategies.

What This Means For You

Transform raw data into actionable training insights

Know Your Ceiling

VO2max

Discover your maximum potential and track improvements over time

Find Your Profile

VLamax

Sprint power or diesel engine? Train for YOUR physiology, not generic plans

Race at Your Limit

Threshold Power

Fuel Smarter

FATmax

Perfect Your Nutrition

Energy Mix

Know exactly how many carbs to carry for race day – no more bonking

Train With Precision

Training Zones

Zones based on YOUR physiology, not generic formulas – every session counts

Different Ways to Know Your Physiology

Compare metabolic testing approaches and find what fits your needs.

Testing ApproachPowertest (At Home)Professional Lab Testing
How Accurate?
95% match with lab results
Very accurate at top facilities
What Do You Learn?
Everything: VO2max, VLamax, fat burning, carb needs, all zones
Depends on the test you book
When Can You Test?
Whenever you want. Bad day? Try again tomorrow.
Appointment booked, pressure to perform
Your Equipment
Test with your own gear - no surprises
Lab equipment may feel different
Time Investment
1-2 hours at home, no travel
Half day with travel and waiting
Track Your Progress
See changes after every workout
One snapshot per visit
What Does It Cost?
€24.90 per month - test as often as you like
150-300 EUR each time
Best For Athletes who want ongoing insights and flexibility One detailed baseline at a top facility

Both approaches have their place. Many athletes use lab tests for baselines and Powertest for ongoing tracking.

THE DIFFERENCE

Powertest: metabolic insights that update with every workout, plus Aerotest, Simulation, and Training Plans included.

Start Your Powertest
€24.90 per month, first 30 days free. Includes Powertest, Aerotest, Activity Analysis, Race Simulation, and Smart Training Plans.

Fuel Your Training Right

SPRINTER and MARATHONA use completely different fuel mixes at the same intensity. This affects nutrition strategy, energy availability, and endurance.

SPRINTER at 200 W:SPRINTER at 12 km/h: 62 g/h carbs

MARATHONA at 200 W:MARATHONA at 12 km/h: 29 g/h carbs

This is why threshold-based nutrition advice fails. You need to know YOUR energy mix.

Energy Consumption: Carbs vs. Fat

g/h (grams per hour)

Train According to YOUR Profile

Every training is like a recipe: you need the right ingredients, the right amounts, and the right timing.

SPRINTER

Can train more intensely but needs less base volume. Benefits from high-intensity intervals.

MARATHONA

Should ride at 90% of VO2max power, not maximum. Benefits from larger base volume.Should run at 90% of VO2max pace, not maximum. Benefits from larger base volume.

Power Development over TimeSpeed Development over Time

SPRINTER - Training Zones & Weekly Distribution

Training Zones

Weekly Training Time Distribution

Shows weekly training time per zone with focus training added to base. Each bar represents total time: base (foundation) + focus (specific intensity) for that zone.

See Results in 3 Steps

Instant insights – lifetime improvements

1
~2 hours

Perform the Powertest

One comprehensive test at home – indoor or outdoor, with your power meter or smart trainer

2
Instant

Upload & Get Results

The system analyzes your data immediately and reveals your complete physiological profile

3
Lifetime

Train Smarter Forever

Apply personalized zones, nutrition plans, and training strategies to every workout

Test Protocols Best Practice

Simple protocols you can do at home or outdoors

Preparation

  • Be healthy and well-rested
  • No intensive training 48h before
  • Fill glycogen stores (eat carbs!)

Equipment Needed

  • Power meter or smart trainer
  • Heart rate monitor (optional)
  • 1.5-2.5 hours of uninterrupted time

Bike Indoor Protocol (Ramp)

Recommended

Duration: 1:30h - 2:30h

  1. 1
    Warm-up: 20 min easy pace
  2. 2
    Sprint: 10s all-out sprint, seated with dead start
  3. 3
    Recovery: 10 min easy in recovery zone
  4. 4
    Ramp Test: 5-45 min
    • Females start with 60 W, males with 80 W
    • Increase power by 20 watts every minute
    • Ride until exhaustion
  5. 5
    Recovery: 30 min easy in recovery zone
  6. 6
    Constant Test: 12 min at highest constant power until exhaustion
    • Begin at a higher power level, rather than starting too low
    • If you still have energy at the end of 12 minutes, continue until exhaustion
    • Test durations between 12 and 40 minutes are valid
  7. 7
    Cool-down: 10 min easy in recovery zone

Preparation

  • Be healthy and well-rested
  • No intensive training 48h before
  • Fill glycogen stores (eat carbs!)

Equipment Needed

  • Power meter
  • Heart rate monitor (optional)
  • 1.5 hours of uninterrupted time

Bike Outdoor Protocol

Duration: 1:30h

  1. 1
    Warm-up: 20 min easy pace
  2. 2
    Sprint: 10s all-out sprint, seated with dead start
  3. 3
    Recovery: 10 min easy in recovery zone
  4. 4
    Constant Test: 4 min at highest constant power until exhaustion
    • Begin at a higher power level, rather than starting too low
    • If you still have energy at the end of 4 minutes, continue until exhaustion
    • Test durations between 4 and 6 minutes are valid
  5. 5
    Recovery: 30 min easy in recovery zone
  6. 6
    Constant Test: 12 min at highest constant power until exhaustion
    • Begin at a higher power level, rather than starting too low
    • If you still have energy at the end of 12 minutes, continue until exhaustion
    • Test durations between 12 and 40 minutes are valid
  7. 7
    Cool-down: 10 min easy in recovery zone

Preparation

  • Be healthy and well-rested
  • No intensive training 48h before
  • Fill glycogen stores (eat carbs!)

Equipment Needed

  • 400m running track
  • GPS watch with 1-second recording
  • Heart rate monitor (optional)
  • 1.5 hours of uninterrupted time

Run Track Protocol

Duration: 1:15h - 1:40h

  1. 1
    Warm-up: 20 min easy pace
  2. 2
    Constant Test: 4 min at highest constant speed until exhaustion
    • Begin at a higher speed, rather than starting too low
    • If you still have energy at the end of 4 minutes, continue until exhaustion
    • Test durations between 4 and 6 minutes are valid
  3. 3
    Recovery: 20 min easy run in recovery zone
  4. 4
    Constant Test: 12 min at highest constant speed until exhaustion
    • Begin at a higher speed, rather than starting too low
    • If you still have energy at the end of 12 minutes, continue until exhaustion
    • Test durations between 12 and 40 minutes are valid
  5. 5
    Cool-down: 10 min easy run in recovery zone

GPS-tracked lap on 400m track with Kalman filtering

Preparation

  • Be healthy and well-rested
  • No intensive training 48h before
  • Fill glycogen stores (eat carbs!)

Equipment Needed

  • Treadmill with 1% incline
  • GPS watch with 1-second recording
  • Heart rate monitor (optional)
  • 1.5 hours of uninterrupted time

Run Treadmill Protocol

Duration: 1:15h - 1:40h

  1. 1
    Warm-up: 20 min easy pace
  2. 2
    Constant Test: 4 min at highest constant speed until exhaustion
    • Begin at a higher speed, rather than starting too low
    • If you still have energy at the end of 4 minutes, continue until exhaustion
    • Test durations between 4 and 6 minutes are valid
  3. 3
    Recovery: 20 min easy run in recovery zone
  4. 4
    Constant Test: 12 min at highest constant speed until exhaustion
    • Begin at a higher speed, rather than starting too low
    • If you still have energy at the end of 12 minutes, continue until exhaustion
    • Test durations between 12 and 40 minutes are valid
  5. 5
    Cool-down: 10 min easy run in recovery zone

Note: A Powermonth subscription is required for full analysis. Upgrade here

Simple, Transparent Pricing

Powertest is included in Premium - try free for 30 days

VO2max & VLamax

Lab-grade metabolic testing

Training Zones

Personalized power & heart rate zones

95% Lab Accuracy

Validated against lab testing

€24,90/month
First 30 Days FREE
Or save 33% with yearly plan (€199/year)
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Frequently Asked Questions

Everything you need to know about Powertest

Powertest achieves 95% accuracy compared to laboratory metabolic testing. Our protocol is based on Prof. Mader's research and has been validated with World Tour cycling teams including Visma | Lease a Bike.
We recommend doing a full Powertest every 8-12 weeks, or when you feel your fitness has significantly changed. Between tests, Activity Analysis updates your profile daily based on your training data.
Both Powertest and INSCYD measure VO2max and VLamax for metabolic profiling. Key differences: Powertest uses a 3-segment protocol and is designed for self-service athletes with fully automatic analysis and daily profile updates from training data. It includes personalized training plans through Smart Coaching. INSCYD uses a 4-segment protocol and is primarily designed for coaches with manual evaluation. Powertest: €24.90/month all-inclusive.
Yes! Lactate testing is available for coaches with a Coach account. Athletes cannot perform lactate tests independently - they require a qualified coach or sports lab to take blood samples. The coach then inputs the lactate data into our platform for enhanced metabolic analysis.

Ready to Know Your True Potential?

Join thousands of athletes and coaches discovering their true power zones. Start with a free test and unlock personalized training today.

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