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Product updates, training tips, and what I'm building at IntervalCoach.

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spotlightMay 12, 20263 min read

Spotlight: @pablo-gil, 32 Days to Trail 100 Andorra

Pablo finished Transgrancanaria Classic in March. He started the next build the week after. In 32 days he runs Trail 100 Andorra: 100 km in the Pyrenees.

FeatureMay 11, 20267 min read

Why your AI coach did that: Agent Log goes GA

An audit log for every decision the AI coach makes. Today's readiness call, why this workout got picked, what changed when your wellness data synced mid-morning, every approve/reject, every adjustment made through Coach+. Now available for every IntervalCoach athlete, with no flag toggle and no tier gate.

FeatureMay 7, 20262 min read

Bringing your coach onto IntervalCoach

You can now invite a human coach onto IntervalCoach. They see your dashboard, edit your weekly plan if you let them, and chat through training with you in Coach+. Coaches use it free; athletes pay for Max.

spotlightMay 5, 20263 min read

Spotlight: @vonpiter, Three Days from UŁAN 600

On Friday morning, @vonpiter rolls out for 500 km of Polish gravel. The week before is the calmest one he has had in three months. That is on purpose.

FeatureMay 5, 20267 min read

Training Score: One Number That Actually Tells You Something

A single 0-100 score for how well you're training, built from four components that map to what coaches actually look at — fitness, overload, consistency, and load management. Now generally available for every Pro, Max, and trial athlete, with three real stories from the data to show what it surfaces.

ai coaching Behind the scenesApr 29, 20262 min read

What Kristen Faulkner's AI Experiment Means for the Rest of Us

The Olympic champion isn't building a dashboard. She's building a model of her own body. Here's why that should matter to every endurance athlete — and why most of us shouldn't have to write the code ourselves.

FeatureApr 26, 20267 min read

April Update: iOS Launch, Apple Health, and Smarter Daily Adaptation

iPhone app on the App Store, Apple Health as a first-class data source, public profiles with milestone badges, peer benchmarks for Max, eFTP projection on Analytics, and a daily adaptation engine that drives the dashboard, the workout, and Coach+ from the same readiness signals.

FeatureApr 22, 20265 min read

Your Apple Watch, Meet Your Coach

Apple Health is now a first-class data source in IntervalCoach. HRV, sleep phases, resting heart rate, VO2 Max, heart rate recovery and more — all flowing into your daily readiness score and coaching recommendations.

TrainingApr 17, 20265 min read

HRV-CV: What Volatility Tells You That HRV Alone Does Not

Most athletes check today's HRV number and decide whether to train. The more useful signal is how stable that number has been over the last two weeks — and an unstable HRV means something different from a low one.

FeatureApr 15, 20262 min read

IntervalCoach Is Now on iPhone

The #1 most requested feature is here. Your AI cycling and running coach is now a native iOS app - daily briefing, push notifications, Coach+ chat, and your full training plan, all from your pocket.

TrainingApr 14, 20266 min read

The Science Behind IntervalCoach

Every decision IntervalCoach makes is grounded in published sports science. Here is what the engine actually uses, from periodization models to taper curves to injury prevention, and why each piece matters.

Behind the scenesApr 8, 202610 min read

How IntervalCoach Adapts Your Workout Every Day

Your weekly plan sets the direction. Every morning a pipeline checks whether today's workout still makes sense, and reshapes it when it does not — from a full rest day to a longer warm-up for sore legs or a breathing cooldown for a rough night.

Behind the scenesApr 3, 20265 min read

From Goal to Daily Workout: How IntervalCoach Plans Your Training

Your training plan is not a static PDF. It is a living system that sets weekly targets, places workout slots four weeks ahead, and fills them in day by day as the week unfolds.

FeatureMar 30, 20262 min read

Performance Benchmarks: See How You Compare

New Max feature: compare your fitness, power, and pace against similar athletes. Performance Benchmarks overlay P50 reference lines on your analytics charts, filterable by age group and sex.

FeatureMar 29, 20262 min read

Training Milestones and Public Profiles

Earn badges for your training achievements and share them on a public profile. Milestones track volume, consistency, fitness gains, and more, giving you something to work toward beyond the next race.

TrainingMar 26, 20266 min read

Five Periodization Models Explained: Which One Fits Your Training?

Linear, Undulating, Block, Polarized, or Pyramidal? Each periodization model distributes intensity differently. Here is how they work, who they suit, and how to pick the right one.

TrainingMar 21, 20265 min read

How to Use CTL, ATL, and TSB to Train Smarter

CTL, ATL, and TSB are the three numbers that drive smart training decisions. Here is what they actually mean, how to use them, and the mistakes that trip up most athletes.

FeatureMar 19, 20263 min read

March Update: Advanced Analytics, Editable Plans, and a Rebuilt Workout Engine

Four weeks of improvements in one recap: five new training science metrics, fully editable training plans, 100+ workout types, a swimming overhaul, and richer post-workout insights.

FeatureFeb 20, 20261 min read

Introducing Coach+: Your AI Coach That Knows Your Training

Meet Coach+, a conversational AI coach that knows your fitness data, your goals, and your schedule. Ask it anything: adjust workouts, reschedule your week, get nutrition advice, or analyze your trends.

Behind the scenesJan 28, 20261 min read

Why I Built IntervalCoach

After 15 years of cycling, I was frustrated with training apps that ignore how you actually feel. So I built an AI coach that adapts to your recovery, your schedule, and your life.