The best video a fitness brand will ever receive from a creator is the one it cannot run. A woman films herself twelve weeks apart, in the same room, in the same clothes, and says she lost 25 pounds with the program. It is honest, it is hers, and in the United States it is a claim the brand is making about what its program does, judged not by whether her story is true but by whether her result is what a typical user can expect. The Federal Trade Commission's guidance on health products puts the case in its own example: a weight-loss supplement ad quoting a woman who lost 16 pounds in eight weeks, with an asterisk. The asterisk does not save it.
Everything about filming a workout is in the guide to UGC for fitness brands; this guide is about the American mechanism that sits under every fitness, weight-loss and body-transformation video: the testimonial is the claim, the claim needs proof, and the proof is about the typical result, not the creator's.
The testimonial is the claim
What the FTC's guidance says
The guidance states that advertisers are liable for the misleading use of endorsements whether in traditional media, on the internet, in social media or elsewhere, and sets an overarching principle: an advertiser should not make claims through a consumer testimonial that would be deceptive or could not be substantiated if the advertiser made them directly. A creator saying "I lost 25 pounds" is, for the FTC, the brand saying "our program makes you lose 25 pounds", and the brand needs the evidence for that sentence. The standard is the one the guidance applies across health-related products: claims about health benefits require substantiation in the form of competent and reliable scientific evidence.
Results not typical
The guidance is explicit about the dramatic result. A testimonial showing results more dramatic than users can generally expect is likely to be deceptive, and attempts to disclaim dramatic results with statements like "Results not typical" do not cure the deception. What the guidance asks for instead is a clear and conspicuous disclosure of the results a typical consumer can actually expect, and its own illustration places that disclosure immediately adjacent to the quote, in prominent font. For a fitness brand the arithmetic is brutal: the brand has to know what a typical user achieves, which means it has to have measured it, and the creator's number has to be read against that measurement before the video runs. A brand that has never measured its typical result has nothing to disclose next to the creator's number and nothing to substantiate the implied claim with, and the guidance asks for both.
The material connection
Whenever a consumer endorser is used, the guidance says, the advertiser should clearly and conspicuously disclose any material connection between the endorser and the advertiser, a connection being material when it would affect the weight or credibility of the endorsement. Free access to the program, a free device, an affiliate code and a fee are all connections; the FTC's influencer guidance describes the disclosure that goes with the post. In fitness, where a creator's own body is the evidence, the connection is the first thing a skeptical viewer wonders about, and the disclosure should be visible before the transformation is.
| What the creator says | What it claims for the brand | What the brand needs before it runs |
|---|---|---|
| "I lost 25 pounds in twelve weeks" | The program produces that result | The typical result, measured, and a clear disclosure of it if the creator's is above it |
| "I feel stronger and I sleep better" | An experience, not a measured outcome | Honesty and the disclosure; low risk if it stays an experience |
| "This burns fat", "boosts metabolism", "melts belly fat" | A claim about what the product does in the body | Competent and reliable scientific evidence for that effect itself, not for the routine around it |
| "Doctors recommend this", "clinically proven" | Expert or study support | A qualified expert who examined the product, or the study, and the connection disclosed |
| "I did it in fifteen minutes a day" | A usage claim about effort | Accuracy against what the program actually requires |
Where fitness meets the supplement rules
Much of the fitness market sells supplements alongside programs and equipment, and the moment a creator holds up a protein powder, a pre-workout or a fat-burner, the Food and Drug Administration's labeling rules for dietary supplements sit behind the FTC's: on the label, a structure/function claim needs substantiation, a disclaimer whose text is imposed, and notification to the FDA within 30 days of first marketing the product with it; a disease claim is not available at all; and in the video the FTC reads the same words as health claims needing competent and reliable scientific evidence, disclaimer or not. The guide to UGC for supplement brands in the United States covers the vocabulary; the fitness-specific trap is the fat-burning claim, which is, for the FTC, a claim about what the product does in the body and needs competent and reliable scientific evidence for that effect, and, for the FDA, a claim about affecting a function of the body; a brand should not assume it holds that evidence because it holds a routine's results. The word to give creators instead is the honest one: the supplement is part of a routine, and the routine is what the creator describes.
Casting for the typical user
The compliance logic changes casting. In most categories a brand wants its best result on camera; in fitness the best result is the least typical one, and the guidance's whole point is that the untypical result deceives. The creators an American fitness brand should be looking for are the ones whose result is representative: moderate, sustained, described with the effort it took. That is also the video that converts a skeptical audience, as the guide to UGC without followers in the United States describes from the buyer's side, credibility on camera being the first thing a buyer looks for, whereas the dramatic transformation is exactly the format the guidance's own example describes. A brand that casts for the typical user solves the compliance problem and the credibility problem with the same decision.
Before-and-after footage is not forbidden; it is a testimonial like any other, and it carries the same obligations. Filmed honestly, at the same distance in the same light, with the timeline stated and the typical result disclosed where the creator's exceeds it, it is a legitimate format. Staged, compressed or lit to exaggerate, it is the deception the guidance describes.
The brief a fitness brand should send
- State the brand's measured typical result in the brief, and instruct creators whose result exceeds it that the video will carry a typical-results disclosure adjacent to their claim.
- Forbid mechanism words, burn, boost, melt, target, unless the brand holds the evidence and supplies the exact sentence.
- Ask for experience language, energy, strength, sleep, routine, effort, as the default register, and keep numbers for what the brand can support.
- Apply the supplement vocabulary to any product that is a supplement: only the label's substantiated sentences, with the disclaimer text in the brief so the creator knows what the product may not claim.
- Put the disclosure of the connection, fee, free program, affiliate code, in the brief and check that it appears in the video itself, before the transformation, not only in the description.
Sources
- Federal Trade Commission, Health Products Compliance Guidance
- FDA, Dietary Supplement Labeling Guide: Chapter VI. Claims
- Federal Trade Commission, Disclosures 101 for Social Media Influencers
Checked on 20 September 2026. This guide is not legal advice. Where this guide and the official source disagree, the official source prevails.
