Your personal AI running coach.
Coach Fartlek remembers all your past workouts, adapts to your goals and how you're feeling right now, and delivers a plan that fits your life.
HOW IT WORKS
Personal coaching, backed by data
Connect your training
Sync with Intervals.icu so the coach gets instant access to your running history, current fitness, and training load.
Share your goals and constraints
Tell the coach what distances you're targeting, which days you can train, and any other constraints that shape your schedule.
Get a tailored plan
Coach Fartlek analyses everything and builds a training plan designed around your situation, your goals, and your everyday life.
Ongoing dialogue and adaptation
Through continuous conversation the plan adapts in real time. The coach monitors your health metrics, logs illness and injuries, and adjusts the plan accordingly. You always have a coach that listens.
WHY FARTLEK?
A coaching relationship that actually lasts
Great coaching goes beyond workout plans. It means understanding the person behind the training and making the right call at the right time.
A human coach can change everything
The right coach can be the difference between training hard and progressing smart. But human coaches have limited time, many athletes, and cannot stay close to every decision in your daily life.
Many AI coaches are smart but impersonal
They analyse data and generate plans, but often stop there. When life changes between workouts, the guidance can quickly become generic instead of personal.
Coach Fartlek brings both worlds together
Coach Fartlek stays on top of your training and recovery, but real value comes through ongoing dialogue. You get a coach that understands your situation, adapts at the right moments, and helps you move forward with consistency.
CAPABILITIES
What does your AI running coach do?
A look at what the coach handles automatically in the background, so you can focus on the running.
Syncs automatically
- All your completed workouts
- Health data such as resting heart rate and HRV
Takes into account
- Your available training time during the week
- Your upcoming races and overall goals
- Your preferences, such as long-run day and number of quality sessions
- Ongoing injuries, illness, and other constraints
Plans
- Training blocks for the coming year
- The details of your current training block
- Workouts for the weeks ahead
Analyses
- Your training history to estimate thresholds and zones
- Every completed workout and how it went
- Load, fatigue, and form over time
Keeps track of
- Your previous conversations and situation
- Planning decisions you have made together
- Ongoing and previous injuries and illnesses
Reaches out proactively
- Weekly planning and follow-up
- Reminders and motivation before upcoming workouts
- Check-ins after completed sessions
- Adjustments when fitness or life changes
FREQUENTLY ASKED QUESTIONS
Questions and answers
The things people most often ask before getting started with Coach Fartlek.
What is Coach Fartlek?
Coach Fartlek is a proactive AI running coach for runners who take their running seriously. It builds a personal training plan from your history, your goals, and how you feel, and reaches out proactively after workouts, before planned sessions, and when recovery signals overload.
Do I need an Intervals.icu account?
Yes. Coach Fartlek pulls your training history, fitness, and load data from Intervals.icu, so an account there is required to get started. Syncing happens automatically in the background.
How much does Coach Fartlek cost?
You can try it for free. After that the service is $9.99/month and you can cancel anytime.
Which platforms is the app available on?
Coach Fartlek is available for both iOS and Android. We are currently in a limited beta. Sign up and we will reach out when it is your turn.
How is Coach Fartlek different from other AI coaches?
Most AI coaches analyse data and generate plans, then stop there. Coach Fartlek remembers all your past workouts and your entire dialogue, adapts the plan in real time as life changes, and reaches out proactively, like a human coach, but always available.
Which distances and runner types is Coach Fartlek for?
Coach Fartlek is built for runners who take their running seriously and handles everything from 5K to the marathon. You set the distances you are targeting and the races you have planned, and the coach builds training blocks accordingly.