A while back I wrote about how I built the largest self-defense school in the United States by renting fitness studios by the hour instead of signing a lease. A lot of people wrote back with the same question: "okay — but how do I actually start?"
So this is the answer, broken into ten steps. It’s the sequence I wish someone had handed me in 2010. It borrows from the frameworks that actually hold up — Eric Ries’s Lean Startup, Geoffrey Moore’s idea of the "beachhead market", Bill Aulet’s Disciplined Entrepreneurship, and a few timeless lessons about demand and focus.
Over this series I’ll take each step in depth. Today we start where every real business starts: the idea.
The 10 Steps (Your Roadmap)
- The idea — the concept, the unique product, and whether anyone actually wants it
- Find your beachhead — one narrow market you can dominate first
- Talk to customers — before you build anything
- Build a minimum viable offering — the smallest version you can test
- Price it — what it costs, what they’ll pay, and your margin
- Keep overhead near zero — rent by the hour, stay lean, protect your runway
- Get your first ten customers — by hand, one at a time
- Measure what matters — retention over vanity metrics
- Reinvest in marketing and teaching — the compounding engine
- Scale deliberately — expand only what’s already working
Let’s begin with Step 1.
Step 1: The Idea — Is There Demand, and Is It Actually Yours to Build?
Most fitness businesses don’t fail because the founder can’t teach. They fail because the founder built something *they* loved that not enough customers wanted to pay for. The first and most important job is to separate those two things: **what you like from what customers like.**
* Start with a real problem, not a passion
Passion is fuel, but it isn’t a business. You might love kettlebell training, aerial yoga, or a niche martial art — but the question isn’t “do I love this?” It’s “does a definable group of people have a problem this solves, and will they pay to solve it?”
The Lean Startup calls your idea a set of assumptions to be tested, not a truth to be defended. Your concept is a hypothesis: ”[This group of people] wants [this result] and will pay [this much] to get it from me.” Everything in Step 1 is about pressure-testing that sentence before you spend a dollar.
* Separate what you like from what customers like
Here’s the trap. You design the class you would want to take. You pick the music you like, the intensity you enjoy, the time slot that suits your schedule. Then you’re surprised when the room is empty.
Customers don’t buy your preferences. They buy outcomes: getting stronger, losing weight, feeling safer, relieving stress, belonging to a community. The exercise is your medium — the outcome is your product. Write down the specific result your customer walks away with. If you can’t name it in one sentence, the idea isn’t ready yet.
* Test for demand before you commit
You don’t need a studio, a logo, or a business license to test demand. You need evidence that people want this. Cheap, fast ways to find out:
- Ask directly. Talk to 15–20 people in your target group. Not “would you take a class like this?” (everyone says yes to be polite) but “what have you paid for recently to get fit, and what frustrated you about it?”
- Run a single pop-up class. Rent a space by the hour, promote it for a week, and see who shows up and pays. Real money is the only honest signal.
- Look at where demand already flows. Are people in your area already paying for something adjacent? Existing demand you can redirect beats demand you have to create from scratch.
- Check search and social. Are people searching for this? Are there active communities around it? Silence is data too.
* Aim at a narrow group, not everyone
Most fitness businesses don’t fail because the founder can’t teach. They fail because the founder built something *they* loved that not enough customers wanted to pay for. The first and most important job is to separate those two things: **what you like from what customers like.**
* Start with a real problem, not a passion
Passion is fuel, but it isn’t a business. You might love kettlebell training, aerial yoga, or a niche martial art — but the question isn’t “do I love this?” It’s “does a definable group of people have a problem this solves, and will they pay to solve it?”
The Lean Startup calls your idea a set of assumptions to be tested, not a truth to be defended. Your concept is a hypothesis: ”[This group of people] wants [this result] and will pay [this much] to get it from me.” Everything in Step 1 is about pressure-testing that sentence before you spend a dollar.
* Separate what you like from what customers like
Here’s the trap. You design the class you would want to take. You pick the music you like, the intensity you enjoy, the time slot that suits your schedule. Then you’re surprised when the room is empty.
Customers don’t buy your preferences. They buy outcomes: getting stronger, losing weight, feeling safer, relieving stress, belonging to a community. The exercise is your medium — the outcome is your product. Write down the specific result your customer walks away with. If you can’t name it in one sentence, the idea isn’t ready yet.
* Test for demand before you commit
You don’t need a studio, a logo, or a business license to test demand. You need evidence that people want this. Cheap, fast ways to find out:
- Ask directly. Talk to 15–20 people in your target group. Not “would you take a class like this?” (everyone says yes to be polite) but “what have you paid for recently to get fit, and what frustrated you about it?”
- Run a single pop-up class. Rent a space by the hour, promote it for a week, and see who shows up and pays. Real money is the only honest signal.
- Look at where demand already flows. Are people in your area already paying for something adjacent? Existing demand you can redirect beats demand you have to create from scratch.
- Check search and social. Are people searching for this? Are there active communities around it? Silence is data too.
* Aim at a narrow group, not everyone
"Fitness for everyone” is not a business — it’s a wish. The tightest, most winnable idea targets a specific person: busy parents in your neighborhood, beginners intimidated by big-box gyms, women who want self-defense skills, desk workers with back pain. A narrow, well-defined customer is easier to find, cheaper to reach, and far more likely to become a loyal regular. (That narrow group becomes your "beachhead" — which is Step 2.)
Test before you move on
Before you go further, you should be able to finish this sentence with confidence and at least a little real-world evidence behind it:
> “I help [a specific group of people] achieve [a specific outcome], and I’ve seen early signs they’ll pay for it.”
If you can, you’ve got an idea worth building. If you can’t yet, stay here — this is the cheapest possible place to be wrong. Every hour you spend validating the idea now saves you months of paying rent on an empty room later.
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Next Up: Step 2 — Finding Your Beachhead
Once you know the outcome you deliver and who you deliver it to, the next move isn’t to go wide — it’s to go "narrow and deep". In the next post we’ll cover the beachhead market: how picking one small segment to dominate first is the fastest route to a business that actually grows.
*Want to test your idea the low-risk way? You can [rent a fitness studio by the hour in TriBeCa and run your first pop-up class without signing a lease.
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*This is Part 1 of the “How to Build a Fitness Business” series.