Editorial policy
How the 12 guides, 6 topic pages and the 8 tools in the proving ground are researched, written, sourced and corrected — and the limits of what any of it can tell you.
Read this first
Everything on this site is general information, not medical, nutritional, or fitness advice. It is not a substitute for professional care and it knows nothing about your health history. Our content is not medically reviewed — there is no clinician on staff — so instead we cite the sources behind every health claim and link them so you can read the original.
A 75-day challenge means intense daily exercise, dietary rules and high water intake. Talk to a healthcare professional before you start, especially if you are pregnant, returning from injury or illness, taking medication, or managing a heart, kidney or liver condition.
Who writes this
One person: Ziggy, the founder of Unbroken, who built the app and runs the articles and tool methodology on this site. Guides carry the byline "By Ziggy · Founder of Unbroken" and link back to the author page.
Ziggy is not a doctor, dietitian, physiotherapist or coach. The experience behind these pages is in building the tracker — pact rules, day boundaries, restarts — which meant reading the public-health guidance and the habit research closely. We state that plainly rather than dressing the site up with credentials that do not exist.
Drafts are written with AI assistance and edited by the founder before they publish. Nothing goes up unread. Every factual claim is checked against the source named on the page, and anything that cannot be sourced is softened or cut rather than dressed up as evidence.
How content is produced
- 1. Start from the question a real person asks. Topics come from what people actually search and from what Unbroken users ask — "does a walk count", "I missed one day, do I restart".
- 2. Research against primary sources. Health and science claims are checked against public-health bodies and peer-reviewed literature (see below), not against other blogs. Claims about another program come from that program's own published rules.
- 3. Write it plainly, keep the numbers honest. Where the evidence gives a range, we give the range. Where a study is small or self-reported, we say so instead of turning it into a law.
- 4. List the sources on the page. Guides end with a Sources section naming each publication and linking to it, so you can verify anything you doubt. If a claim has no source we can check, it does not run.
- 5. Add the safety context. Pages about training volume, water intake, illness and the body carry a visible disclaimer, because those are the pages where being wrong could hurt someone.
The sources we rely on
In rough order of how often they are used:
- MedlinePlus, US National Library of Medicine — water and fluid intake, exercise guidance, plain-language clinical information.
- Peer-reviewed literature via PubMed Central and PubMed — habit formation, goal monitoring, accountability, hydration.
- Cleveland Clinic — clinician commentary on challenge formats, training while ill, recovery.
- World Health Organization — physical activity guidelines and population-level context.
- A program's own published rules — when we describe what another challenge asks of you, the source is that challenge's own page, linked, not our summary of someone else's summary.
Every source URL on this site was checked to resolve before it was published. If a link rots, tell us and we will repoint or remove it.
What this site does not do
- It is not medically reviewed. No doctor or clinician reviews these pages before publication. Nothing here should be read as a clinician's opinion, and you will never see a "medically reviewed" badge on this site.
- It does not diagnose. Our quizzes and trackers are prompts for thinking, not assessments. Only a qualified professional who can examine you can tell you whether a training load is safe for you.
- It does not prescribe training or diet. No programming, no macros, no supplement advice, no telling you to push through pain.
- It does not tell you to finish at any cost. A day count is not worth an injury or a hospital visit. Every guide that touches the body says so.
- It does not invent evidence. No made-up statistics, no studies we have not read, no "95% of people" numbers with nothing behind them.
Updates and corrections
Every guide shows a "Last updated" date at the top. That date changes when the content changes — not on a schedule, and never just to look fresh.
We revisit a guide when a cited source publishes a substantive revision, when guidance changes, or when a reader points out an error. Factual corrections are made as soon as we can verify them.
Found something wrong, outdated or badly explained? Tell us — include the page and, if you have one, the source. Corrections that change meaning get a fresh update date.
Money and independence
This site is published by Unbroken and exists partly to introduce people to the Unbroken app, which is free to use with an optional paid tier. We say so openly.
We run no display ads, and no guide, comparison or tool on this site is sponsored, paid for, or influenced by a third party. Comparison articles that mention other apps or programs are not affiliate placements — we make nothing if you pick one of them.
Trademarks and independence
Unbroken is an independent app and is not affiliated with or endorsed by any trademarked program. 75 HARD is a registered trademark of its owner, and we are not connected to it, licensed by it, or speaking for it.
Where our guides name another challenge, they do it to describe it accurately and to link to that program's own published rules. Unbroken does not run any other company's program, and no page here should be read as that company's word.
Questions about this policy
Write to us via the contact page. See also our privacy policy and terms of service.