The company
HealthAI is an expert data company for running. We study the methods of world-class coaches and the research of leading scientists, check every idea against the evidence, and turn it into a coach that knows your goal, your training data and your day: Catherine Flockhart, AI running coach, for runners at every level.
The expertise behind HealthAI
19
experts whose published methods and research HealthAI is built on
17
PhD and medical scientists among them
9
parts of running, from easy runs to race day
5
areas of health that shape running performance
Coaches of Olympic and world champions. Recovery leads for Olympic teams. Professors and research scientists at leading universities. HealthAI studies their published methods and research, then checks every idea against peer-reviewed studies before it reaches a member.
HealthAI studies these experts' published work. They are not affiliated with HealthAI and have not endorsed it.
What HealthAI is
01
We gather the methods of elite coaches and the findings of leading scientists across nine parts of running and five areas of health. Every idea is checked against peer-reviewed research, graded by how strong the evidence is, and kept current as the science moves.
02
Catherine applies that knowledge to you: your goal, your training data and your recovery. Catherine has a name, a face and a voice, so working together feels like working with a person who knows running deeply.
03
Members train from a secure health portal: a plan built from their own data, the reasoning behind every session, their full history and dashboards, and a coach they can write to at any time.
What HealthAI is not
Not a general chatbot. Catherine reasons from a curated expert running library, not the open internet.
Not a templated plan. Every plan is built from the training you have actually done.
Not medical care. HealthAI provides coaching and education, never diagnosis or treatment.
The HealthAI running library
Every part of running, and the health behind it, built from the methods of world-class coaches and the research of leading scientists. Catherine Flockhart applies all of it to your training.
The training
Running 01 · HealthAI running library
Based on: Methods from a collegiate head coach and former science advisor to Olympic medal-winning runners, checked against peer-reviewed research.
Why easy means easy
Conversational effort builds the aerobic base
Running at a pace where you could hold a conversation grows the heart, capillaries and mitochondria that every faster session depends on, without the fatigue that blocks the next workout.
Consistency over novelty
Steady weeks beat heroic days
Fitness comes from months of repeatable training. Constantly changing workouts feels productive but rarely beats a simple plan done consistently.
Stress plus rest
Fitness is built while you recover
Training is the signal and recovery is when the body adapts, so easy days and sleep are part of the plan, not a break from it.
How much easy running
Most of the week, by design
Well-trained runners spend most of their running at easy effort. Keeping easy days truly easy is what makes the hard days possible.
Live coaching in running: Catherine Flockhart, from $30 a month.
Meet CatherineThe racer
Running 06 · HealthAI running library
Based on: Methods from a collegiate head coach and former science advisor to Olympic medal-winning runners, checked against peer-reviewed research.
Even pacing
Steady effort beats a fast start
Running the first half at or slightly slower than goal pace saves energy for the second half, and most personal bests come from even or slightly negative splits.
The taper
Less volume, same sharpness
In the final one to three weeks, volume drops while some race-pace work stays, so you arrive rested without losing fitness.
Your race-day plan
Pace, fuel and warm-up decided in advance
A plan built from your training sets the pace for each section, the fuel and the warm-up, so the important decisions are made before the start.
Positioning and tactics
Running your race, not someone else's
Staying relaxed in the pack, ignoring early surges and saving the hardest effort for the end turns fitness into a better finish.
Live coaching in running: Catherine Flockhart, from $30 a month.
Meet CatherineFive areas
Health 01 · HealthAI running library
Based on: Research from university nutrition and muscle scientists and elite endurance performance staff.
How much protein you need
The daily amount that matters
About 1.6 g per kg of body weight a day, roughly 0.7 g per pound, covers muscle-building needs for most active adults. Spread it across meals.
Fueling long sessions
Carbohydrate before you are hungry
For sessions longer than about 90 minutes, eating carbohydrate on a schedule protects energy and performance late in the session.
Drinking to your sweat rate
Your numbers, not a rule of thumb
How much you sweat varies widely between people. Measuring yours turns hydration from a guess into a plan.
When you eat
Meal timing and your daily rhythm
Eating earlier in the day lines meals up with your body clock. Early results are encouraging, and larger trials show smaller effects.
HealthAI provides coaching and education, not medical advice.
How a coach is made
Our engineers specialize in artificial intelligence, and Catherine is built through the same five stages.
We gather writing and research from established experts in running and the areas of health that shape it.
Generic, machine-written content and material that lacks real expertise are excluded.
The remaining material is organized, maintained, and kept current as the evidence evolves.
Natural voice technology lets members speak with their coach by phone, not just in writing in the health portal.
A complete character with a voice, a face, a personal history, and deep subject knowledge.
Practice used by world-class coaches and athletes, checked against research where it exists.
Supported by multiple trials or a meta-analysis.
Supported by some trials or large long-term studies.
Early, small or debated research. We say so plainly.
Working with Catherine
Every member gets the same standard, on either plan.
Catherine coaches running only, from the 800 meters to the marathon.
Built from the runs you log, your notes and your results, and rebuilt as you train.
You always know what a session is for and why it fits today.
Your plan, history, dashboards and weekly score in one secure place.
Ask Catherine anything in the portal and your plan changes when you ask.
Scheduled calls from Catherine, and a line you can call whenever you need to.
Our products
Distance running, from the 800 meters to the marathon
Catherine individualizes periodization, intensity and race execution from your race history and training data. Built for competitive runners whose next improvement depends on the details.
No claim reaches a member without a source behind it, and uncertain research is labeled as uncertain.
The running library is reviewed continuously as new research is published.
Catherine works only from the training data you choose to share.
HealthAI provides coaching and education, not medical advice. Talk to your doctor about any health condition.