This week's Fitt Insider covers the health category's credibility crisis, and the numbers are worse than most brands assume. Half of Americans under 50 get health guidance from influencers and podcasts. Pew tracked roughly 7,000 popular US health influencers and found only 17% of those claiming healthcare backgrounds are conventional doctors, while 16% overall have no credentials at all. A separate report estimates 40% of top health-tagged TikTok videos were AI-generated — including deepfake MDs and posts recommending products that don't exist.
Your members are making training and nutrition decisions inside that feed. So is every prospect you're trying to reach.
Trust is now a marketing channel
The issue's most useful observation is that restoring credibility requires participation, not dismissal. Consumer brands are hiring chief medical officers to legitimize their content by affiliation. Nature and the WHO joined TikTok to fight misinformation with citation. NewsGuard's browser extension rates health sources, and MDisrupt embeds board-certified clinicians alongside AI developers so models track medical consensus.
The common thread: everyone credible is racing to make their credibility legible. Not louder claims — verifiable ones.
For a gym, studio, or fitness app, that's both a warning and an opening. The warning is that the ambient noise makes audiences skeptical of everything, including you. The opening is that almost nobody in your local market can prove what they say, and you can.
Proof beats claims, and your members can generate it
Cadoo Games produces evidence as a byproduct of how it works. The camera counts reps and scores form on those movements. Steps and distance come from Apple Health or Google Health Connect. When a member finishes a game, the result isn't a testimonial — it's a verified record of work they actually did.
That has a direct marketing use. Verified workouts turn into shareable, skinned videos carrying your brand into your members' feeds. In an environment where 40% of the top health content is synthetic, a real person your audience knows, doing real reps, with a result that was checked, is a fundamentally different kind of asset than a stock-footage ad.
- It's earned, not claimed. The member did the work; the brand just carries the credit.
- It's specific. Real people, real numbers, no vague transformation promises.
- It compounds. Recurring games mean an ongoing stream, not a one-off campaign.
Say less than you can prove
There's a discipline that goes with this. The reason the category has a credibility problem is that too many brands made health claims they couldn't support. The fix isn't to make better-sounding claims — it's to restrict yourself to what your data actually shows.
We hold ourselves to that line. Cadoo verifies activity: reps, form, steps, distance. It doesn't diagnose anything, and it isn't medical advice. What a brand can honestly say is that members trained, how often, and how consistently — which is exactly the claim that matters for retention anyway.
Elsewhere in the issue, Happy Health raised $75M for a clinical-grade smart ring that diagnoses sleep apnea at home and connects patients to physician-guided treatment, and Eight Sleep is using predictive AI to adapt bedroom environments. Nike and Foot Locker unveiled a retail and rec center hybrid in LA's Crenshaw neighborhood, built around sport, culture, and connection. Note that the credible players are pairing their claims with either clinical pathways or physical community — both harder to fake than a caption.
What to do this quarter
Audit your marketing for anything you can't evidence, and replace it with something you can. Then give your members a reason to produce proof on your behalf: a recurring game, a small self-chosen stake, friends in the mix, and shareables that carry your brand when they win.
We're also building toward winnings converting into credit or perks at the brand itself. That's on our roadmap and not live yet, but it fits the same principle — rewards tied to verified behavior rather than to a claim.
To talk it through, see Cadoo for brands or email Tim@cadoo.io.
Frequently asked questions
How much health content online is AI-generated?
The report cited in this issue estimates 40% of top health-tagged TikTok videos are AI-generated, including deepfake doctors and recommendations for products that don't exist. That's alongside Pew's finding that 16% of popular US health influencers have no credentials at all.
Why does that matter to a gym or fitness app?
Because it raises the cost of being believed. Audiences discount claims by default, so marketing that relies on assertions performs worse. Brands that can demonstrate real member activity have an advantage that competitors can't copy with a better caption.
What can a brand honestly claim from Cadoo data?
That members trained, what they did, and how consistently. The camera contributes reps and form. Steps and distance come from Apple Health or Google Health Connect. It is not a diagnostic tool and nothing in it is medical advice. Engagement and consistency are the honest claims, and they're the ones tied to retention.
How do shareables differ from regular user-generated content?
They come out of a verified workout rather than a self-reported one, and they're skinned with the brand automatically. That means the content arrives with proof attached and without asking members to produce marketing material on your behalf.
