Strength
Tall, with a steady head
Head, shoulders and hips stack up in one line, with a slight lean from the ankles. Your head stays at the same height through frames 3 to 9.
AI running form analysisFind free speed in your running form.
Training for a half marathon or a triathlon? Film 15 seconds of running and see what a coach would fix first, with the frame that shows it and a drill to fix it.
Filming tip: Film from the side, phone at hip height, 3 to 5 m away, camera still. A treadmill is ideal. 10 to 20 seconds of steady running.
Free first look · No sign-up · Your video stays on your phone
Why form matters
You've put in the training. Don't lose it on every step.
Your fitness took months. A foot that brakes or a stride that bounces costs you a little on each of the roughly 20,000 steps of a half marathon. How you move, you can start changing this week.
Hold race pace for longer
Bouncing up and down, or braking with a foot that lands far in front of you, burns energy that doesn't move you forward. Waste less on every step and you have more left for the last kilometres.
Run better off the bike
Form falls apart when your legs are tired, which in a triathlon is exactly when you start running. That's the stride worth checking and training.
Stay healthy through your build
Some patterns, like overstriding, are often linked to knee and shin trouble. Catch them early, so a niggle doesn't cost you weeks of training or your race.
How the running video analysis works
Film your run
10 to 20 seconds from the side. A friend or a steady shelf does the job.
Tria looks at your stride frame by frame
Your video stays on your phone. Only a few still frames are analysed.
You get feedback on your running form, with drills
What you do well, what to fix first, and a drill for each fix.
What your running form analysis shows
Free
A first look at your biggest strength, with the frame that shows it.
Membership
- Your full analysis: two strengths and the two things to fix first
- Every point with its frame, every fix with a drill you can start this week
- Save it as a PDF to keep
- Up to 10 checks a month to track your form through your training block
ExampleNot your result
Tria
Your AI running coach
Your posture is a real strength: tall, with a steady head. The first thing I'd work on is your hands, so your shoulders stay relaxed.
Fix first
Looser hands
In frame 3 your front hand is clenched into a fist and comes up to your chest. That tightens your forearm and shoulders and wastes energy.
Your drill
Standing arm swing
3 × 30 s
Stand tall with your elbows at roughly a right angle. Swing your arms loosely forward and back, hands slightly open as if holding a raw egg. Keep your hands below chest height.
Your AI running coach
Hi, I'm Tria.
I'm Triaform's AI running coach. I look at your stride frame by frame, the way a good running coach would: what you already do well, the one thing to fix first, and a drill you can start this week.
Tria is an AI. Her feedback is coaching, not medical advice.
What the pros do
The best runners study their stride frame by frame. Now you can too.
Elite runners and their coaches use motion analysis to find small changes in how they move. Until now that meant a lab, special cameras and an appointment. Triaform gives you the same kind of look with the phone in your pocket.
In a lab
- A booked appointment
- High-speed cameras and a treadmill
- A specialist to explain the results
With Triaform
- Any time, results in about a minute
- Your phone and 15 seconds of running
- Tria's read with drills, in about a minute
Why runners trust it
Specific, private and honest
Your video stays on your phone
We look at a few still frames and don't store them. No account needed.
Every point shows its frame
No vague “great form”. Each finding points to the frame where you can see it yourself.
Coaching, not diagnosis
If something looks like an injury risk, Tria tells you to see a physiotherapist. She never guesses.
Questions about running form analysis
What is a running form analysis?
A running form analysis, also called running gait analysis, looks at how you move when you run: where your foot lands, how much your knee bends, your posture, how much you bounce and how your arms swing. Triaform does it from a 15-second side-on phone video. Tria, an AI running coach, reviews 20 still frames and tells you what you do well, what to fix first and which drill helps.
Do I need a lab or a running shop for a gait analysis?
Not for a first check. A lab with high-speed cameras measures exact angles, and a running shop mostly looks at your feet to choose shoes. Triaform looks at your whole running form from your own phone video, on a treadmill, a track or a flat path. If something hurts, see a physiotherapist.
Do I need to install an app?
No. Triaform runs in your phone's browser. Open triaform.com, tap “Upload your video” and pick or record a clip. Your video stays on your phone.
Who sees my video?
Nobody. It stays on your phone. We only send a few still frames for the analysis and don't store them.
Who is Tria?
Tria is Triaform's AI running coach, not a real person. She was trained to give feedback the way a good running coach would, from still frames of your run.
What do I need?
A phone, and someone or something to hold it steady. A treadmill is ideal, but a track or a flat path works too.
What does it cost?
The first look is free. The full analysis is part of the Triaform membership, and you see the price before you pay.
When should I film?
At the start of your training block, then every 3 to 4 weeks to see what has changed. Triathletes: also film once right after a bike session, when your legs are tired.
How much faster will I get?
That depends on where you start. Form changes take a few weeks of regular drills before they feel natural. Film again after three or four weeks and compare.
Is this medical advice?
No. Coaching feedback only. If something hurts, see a professional.
Film first. Then train.
Your race is coming. 15 seconds of video, Tria's read in about a minute. Free first look, no sign-up.