Product Pricing Coaches About FAQ Blog Contact Forum

How Does AI Endurance Work?

AI Endurance is built around your Digital Twin: a neural network trained on your own workout history that learns, on a deep level, how your body responds to training. It doesn't adapt a predefined plan to you. It builds your plan from scratch, for your physiology, your goals, and the hours you actually have.

Trail runner on a mountain ridge at dawn

Road cyclist on a coastal road at dusk

Open water swimmer at sunrise

Your Digital Twin

Every workout you upload teaches your Digital Twin how you respond to training: which intervals move you forward, how quickly you recover, where your thresholds sit. Zones are detected automatically from your data and heart rate variability, so there are no ramp tests, time trials or 20-minute protocols. And because the model is yours, its answers are too: your plan looks like you, not like a template.

Optimized for Race Day

Most apps predict your fitness. Ours optimizes it. Your Digital Twin searches the possible training futures, volume, intensity, zone distribution, and locks onto the plan that maximizes your predicted performance on the day of your goal event: everything from 5k pace and FTP to Ironman and ultra endurance power. Before you start, you see the improvement it predicts from following your plan versus repeating your own training. Then the whole search re-runs as you train.

The Science on Our Blog

State-of-the-art data analysis

Automatic Zone Detection

AI Endurance automatically detects your training zones via automatic aerobic and anaerobic threshold detection, using HRV and other important variables.

No Tests Required

We use your training data to predict your performance and optimize your training plan. No need for ramp tests, time trials or 20 minute tests.

Accurate Predictions

Our AI models predict and optimize your performance by analyzing every second of your workout history, covering everything from 5k pace and FTP to Ironman and endurance power.

We Publish the Science

We don't just read sport science, we produce it: peer-reviewed HRV and DFA alpha 1 research with leading exercise physiologists, built on the same data pipeline that trains your plan.

Recovery and Readiness to Train

Before every workout you should know whether you're actually ready for it. We fit a recovery model to your HRV, resting heart rate, DFA alpha 1 and training load, together with your morning check-in and soreness feedback, and turn it into a simple recovery score for each system: cardio and muscular. When the score says back off, your plan says so too, proposing a shorter workout or a rest day you can accept with one tap.

A Plan That Adapts to Your Life

Long workdays, travel, illness, a missed session: no training block survives contact with real life, and your plan shouldn't pretend otherwise. AI Endurance recalculates from every workout you actually do (or don't do), reshuffles your week around your availability, and keeps everything pointed at your goal. You never have to wonder what to do instead; the answer is already on your calendar.

An AI Coach That Knows Your Data

Ask anything you would ask a human coach: why this interval session is on your plan, whether to move the long ride, what yesterday's race says about your pacing. Our AI coach reads your actual data, your plan, recovery, goals and workout history, and it can act: analyzing activities second by second, creating and rescheduling workouts, adjusting your zones. We are committed to running it on the most capable AI models available, and we upgrade as the state of the art moves.

Measure and Train Your Durability

How much power do you lose after 1,000 kJ of work? Durability, your resistance to fading during long efforts, is what separates finishing strong from hanging on, and recent sport science puts it at the center of endurance performance. We measure yours from your everyday training, no lab protocol required, compare your fresh and fatigued power curves, and make durability a target your plan can train. Built on our own published field research.

More on Our Blog

Sports Nutrition

Developed with leading sports nutritionists: daily calorie and macronutrient targets computed from your past and planned training, so you fuel for the workout in front of you. On top of that, our AI crafts meal plans to match: describe how you like to eat, vegetarian, vegan, gluten free, any preference, and get a plan that hits your numbers.

Integrations

We integrate with the platforms you already use. Import your training and recovery data from Garmin, Suunto, Coros, Polar, Wahoo, Hammerhead, Intervals.icu, Strava, Stryd, Oura, Whoop and Zwift, and export your workouts to Garmin, Suunto, Coros, Wahoo, Hammerhead, TrainingPeaks, Intervals.icu, Nolio, Zwift, Rouvy, TrainerDay, or execute them right here on AI Endurance. Train the way that works best for you.

Garmin

Suunto

Coros

Polar

Wahoo

Hammerhead

Intervals.icu

Strava

Stryd

Oura

Whoop

TrainingPeaks

Nolio

Rouvy

Zwift

TrainerDay

FAQ API MCP Blog Terms Privacy