The standard, written down.
Anyone can say “evidence-based”. It costs nothing and means nothing until somebody publishes the rules they hold themselves to and then lets you check the work against them.
These are the rules. They are the same for all ninety-seven titles.
The source hierarchy.
Not all evidence is equal, and pretending otherwise is how most fitness writing goes wrong. Claims are sourced in this order, and the order is not negotiable:
- Systematic reviews and meta-analyses — many studies, weighed together.
- Randomised controlled trials — where the design allows a causal claim.
- Cohort and observational work — useful, and never dressed up as causal.
- Position stands from the ACSM, NSCA, ISSN, WHO and ACOG — consensus, labelled as consensus.
A single exciting study does not move a claim up this list. It usually does not move a claim at all.
Four labels, applied to every sentence that asserts something.
The problem with most health writing is not that it lies. It is that a cited fact, a professional judgement and a personal opinion are all written in the same confident voice, so you cannot tell which one you are holding. Here they are separated:
- Cited — a named study, meta-analysis or position stand sits next to the sentence. Check it yourself.
- Prescription — house guidance drawn from consensus. Called guidance, never “studies show”.
- Observation — twenty-five years of coaching, labelled as experience rather than evidence.
- Illustrative — worked arithmetic to make a point. Never stated as a statistic, because it isn't one.
Confidence, graded and visible.
Cited is not the end of the argument. A citation can sit behind a finding the field has settled or one it is still fighting about, so every cited claim also carries a confidence grade: Settled, Strong, Emerging or Contested.
Where experts disagree, you get the disagreement rather than the tidier paragraph. Where the evidence is thin, the text says the evidence is thin. A claim graded Emerging in one volume is graded Emerging in all of them.
The banned list.
Certain words do reliable damage, because each one smuggles in a claim that the evidence behind it cannot carry. None of them appear anywhere in this Library, in any volume, ever:
miracle · magic · secret · hack · guaranteed · cure · detox · cleanse · toxins · blast · torch · melt · shred · superfood · boost metabolism · doctor-approved
Where one of them names a myth being taken apart, it appears in quotation marks and is labelled as the claim under examination — never as anything this Library asserts.
The limits, stated up front.
The narration is an AI voice. That is disclosed here, on every product page, and in the audio itself. It is not Nelson's voice and it is not pretending to be. A human wrote every word and is accountable for every claim.
Corrections are published, not quietly patched.
Every rule above will eventually fail to catch something. When a claim in a finished product turns out to be wrong, it is corrected in the PDF, the narration script and the audiobook, and the correction is written up in full — what it said, why that was wrong, what it says now, and whether the confidence grade changed.
That record is public and it is not curated to flatter anyone.