How to start a AI Video Diagnosis of Your Movement Pattern business: plan and growth
One person can't do a lunge in any variation after a hundred tutorials; another hasn't activated their left glute in Bulgarian split squats for a year. Generic tutorials don't fix their case.
An owner can start “AI Video Diagnosis of Your Movement Pattern” from a complaint people already posted. The offer, in one line: Upload a clip of your lunge or split squat and get told which compensation your body makes, plus targeted fixes. It is for gym-goers and people who train at home. Charge a subscription, and test a price between $10 and $49 a month. Begin in more than one country. Buyers already talk about this in r/xxfitness. One thread gathered 60 votes and 84 replies across Sep 14, 2026 – Oct 14, 2026. Use that room to meet the first twenty buyers. Do not export it, and do not republish the posts. The idea, the evidence, and the market estimate on this page are free to read. Two paid prompts finish the job: one drafts the offer, the price, and a ninety-day calendar; the other drafts a month of conversations and proof. One credit unlocks both. A software specification is not on this site. When the company is the product itself, a single link further down opens the founder library.
Unable to do lunges. At allr/xxfitness · Sep 14, 2026 – Oct 14, 2026 · 60 votes · 84 replies · Open the thread
Who would pay
Gym-goers and people who train at home. Start in more than one country, and charge a subscription, testing a price between $10 and $49 a month.
The thread above is the public complaint this business can learn from. Verbatim quotes are not invented. Further sources, when a later report adds them, stay with the evidence.
What buyers use today
- Online coaches
- Form-check subreddits
The offer, in our words
An app where users upload video of a movement and AI pinpoints the asymmetry or compensation in their body, with targeted corrective exercises.
Score 3.10, Warm. Pain, willingness to pay, demand, and the gap in current options drive it. We are not scoring how fast you can code.
Market size
An estimate, built from the bottom up: real customer counts × a realistic price. It shows the size of the prize, not a forecast.
TAM Total addressable
$924M a year
7.7M members · 10% of US gym and studio members
SAM Serviceable
$180M a year
1.5M members · app-store reach in the US
SOM Obtainable in 3 years
$1.8M a year
15,000 members · 1% of the reachable segment in three years
What that means
15,000 members at $10/mo = $1.8M ARR
Medium confidence · estimated Oct 2026
How we estimated this
- Base: 77,000,000 US gym and studio members.
- Has the problem: 10% (assume 10% want form feedback).
- Revenue per member: $120 per year ($10/mo).
- Reachable: 20% (app-store reach in the US).
- Three-year capture: 1% of the reachable segment.
TAM is customers with the problem × revenue per customer. SAM is the part a new business can reach. SOM is a cautious three-year share of SAM. The bars use a log scale. A share marked “assume” is our judgment, not a measurement.
The business-plan prompt
The offer, the price, and a ninety-day calendar, written for an agent. 1 credit unlocks both prompts for this idea: this plan and the growth playbook below.
# Business plan prompt: AI Video Diagnosis of Your Movement Pattern You are writing a practical plan for one owner who will sell this as a business. Do not write a software specification, a venture memo, or a feature list. Use short sentences. Where a number is unknown, give a range and say what to measure. ## The business Working name: AI Video Diagnosis of Your Movement Pattern What the customer gets: Upload a clip of your lunge or split squat and get told which compensation your body makes, plus targeted fixes. Who pays: Gym-goers and people who train at home
Locked · the first lines are above
Unlock both prompts for this idea · 1 credit ($9.99)
One credit opens the business plan and the growth playbook together, for good. Credits work on both businessideastobuild.com and realstartupideas.com.
Sign in once with your Real Startup Ideas account; the same credits work on both sites.
The growth playbook
Thirty weekdays of conversations and proof. Not an ad plan. Included with the plan above, on the same credit.
# Growth prompt: AI Video Diagnosis of Your Movement Pattern You are planning thirty days of distribution for a business that already has an offer. The offer: Upload a clip of your lunge or split squat and get told which compensation your body makes, plus targeted fixes. The buyer: gym-goers and people who train at home. Price band: between $10 and $49 a month. Do not propose ads, a viral loop, or a rebrand. Propose conversations, proof, and a repeatable weekly rhythm. ## Starting point A public thread in r/xxfitness drew 60 votes and 84 replies. The pain, in the owner's words: One person can't do a lunge in any variation after a hundred tutorials; another hasn't activated their left glute in Bulgarian split squats for a year. Generic tutorials don't fix their case.
Locked · the first lines are above
Unlock both prompts for this idea · 1 credit ($9.99)
One credit opens the business plan and the growth playbook together, for good. Credits work on both businessideastobuild.com and realstartupideas.com.
Sign in once with your Real Startup Ideas account; the same credits work on both sites.
Questions
How much money do I need to start?
Enough to talk to buyers and deliver the offer once. A service version can start with a written process and a way to take payment. A software version is a larger bet and is not required to test the price. The band to test is $10–49 a month.
How should I price it?
Test a price between $10 and $49 a month, charged as a subscription. Raise it after three paid pilots, not before the first conversation.
Where do the first customers come from?
r/xxfitness is the clue. A related thread gathered 60 votes and 84 replies. Show up there, follow the room's rules, and ask for conversations. Do not scrape it.
Do I need to write code?
No. The prompts on this page draft a plan and a month of growth. Code is a later choice. The founder site linked once below is where the build document lives, if you want it.
When the business is the software itself, the specification lives on the founder site. Have this built
A two-week build starts at $10,000 on that site, after a $1,000 scoping fee.
Plans and growth playbooks
One credit opens both prompts for this business.
The idea, the evidence, and the market estimate stay free. The business plan and the thirty-day growth playbook for AI Video Diagnosis of Your Movement Pattern cost one credit, together, and stay unlocked.
Credits work on both businessideastobuild.com and realstartupideas.com. Sign in once with your Real Startup Ideas account; it is the same wallet.