You can build the best program in the world. It means nothing if they don’t show up.
Fitness is B.S. uses behavioural science to solve the fitness industry’s oldest problem: why people stop coming. If you run a gym, manage a fitness business, or coach real humans, this is where research meets the floor.
Who this is for
Gym Owners
You have spent years building something real. The members who stay love it. The problem is the ones who leave before they get there. Behavioural science explains why, and what to do about it.
Fitness Marketers
Most fitness marketing exploits biases to get signups and ignores what happens next. This site is about using psychology ethically — to attract people and actually keep them moving.
Coaches & PTs
You already know how to write a program. The hard part is getting someone to follow it. Every post here is built on the research behind why people do what they do — and why they stop.
Latest from the blog
Every post starts with a published study and ends with something you can use on Monday morning.
- What Netflix Knows About Gym Member Retention That You Don’t
Research on Netflix subscribers reveals that gym member retention hinges on perceived switching costs, rather than mere satisfaction. Members who develop personal connections, progress tracking, and shared milestones are less likely to leave their gym. It underscores the importance of understanding what members truly stand to lose if they cancel their membership. - Why Lululemon (and Gymshark) Own “Community” And Your Gym Community Strategy Doesn’t
Successful gym community strategies can learn from brands like Lululemon and Gymshark, which focus on identity and belonging rather than just equipment or pricing. It’s crucial for gyms to foster genuine communities that resonate with member identities, ensuring loyalty not through amenities but by creating emotional connections and a sense of shared values among members. - Nobody Joins a Gym: Identity Signaling in Fitness Marketing
In 2024, the toy Labubu sold for $170,000, highlighting the phenomenon of symbolic consumption where ownership reflects identity rather than utility. Research indicates that consumers purchase items for social signaling. This parallels gym memberships; people buy them to project a fit identity. Authenticity in identity signaling enhances retention and engagement. - The Hidden Power of Starts and Ends in Fitness Marketing
Timing is crucial in gym marketing, influenced by the Fresh Start Effect, where specific calendar points inspire motivation. At the start of cycles, competence appeals are most effective, whereas warmth appeals resonate better as cycles end. This rhythm allows gyms to foster connection and support, enhancing marketing effectiveness by aligning messages with members’ changing psychological needs.
The Behavioural Science Library
50 cognitive biases explained through the lens of fitness and gym ownership. Each entry breaks down the psychology, links it to academic research, and shows you how it plays out on your gym floor.
Stay in the loop
New research breakdowns and practical tactics for gym owners and fitness professionals. No filler. No spam. Just the stuff that actually works.