Menno Body Fat Percentage: What Menno Henselmans Charts Really Show

What people actually mean when they search Menno body fat percentage

Three words, no surname, and the search engine still knows exactly who you mean. In the online lifting world, Menno means Menno Henselmans, and body fat percentage means the photo guides he built to show what a given number really looks like on a real body. It is worth being clear about that from the start, because the phrase is misleading. Almost nobody typing it wants to know what Henselmans himself measures. They want his chart: the one where a man scanned at 11.9 percent stands beside a man at 19 percent, both photographed within days of a laboratory grade body composition test.

That makes it a curious little corner of search, sitting halfway between a flat factual lookup such as where the chips inside your computer are actually manufactured and a self placement exercise like working out which bracket you belong in. You are not looking for a definition. You are looking for a mirror with a number written underneath it.

Who is Menno Henselmans?

Where is he from and what did he do before fitness?

Henselmans is Dutch, and by his own account he started lifting weights as a teenager and never really stopped. The unusual part is what came in between. Before fitness was a job, he worked as a business consultant specialising in advanced statistical data analysis. He holds a bachelor degree awarded magna cum laude from an international honours college in the Netherlands, and a master in behavioural economics from the University of Warwick in England. Then he left the consulting salary behind to build a coaching business online, a pivot that will feel familiar to anyone who has followed the sales world figures who turned a career into a personal brand or the founders who built something large from an idea nobody had asked for.

He called that business Bayesian Bodybuilding, after Thomas Bayes, the eighteenth century statistician whose approach to probability describes how you update a belief when new evidence arrives. The name was a thesis in itself: treat training advice as a set of claims that should move when the data moves. The site later took his own name, but the method kept the label.

What does he actually do day to day?

Mostly, he reads and explains. Henselmans writes long research reviews, coaches clients on physique, teaches a personal trainer certification, speaks at seminars, records a podcast, and cuts the results into short clips for social feeds. His own biography notes that his website was once ranked the number one fitness site by The Huffington Post. He is also a published author: The Science of Self-Control gathers 53 practical tips distilled, he says, from more than three years of work and 542 scientific studies, covering willpower, productivity, and why sticking to a diet is a problem of attention rather than virtue. Building that kind of library from nothing but consistency is the same slow grind that turns a home camera and an upload schedule into a full time audience.

What do the body fat percentage guides actually show?

Here is the part the search is really after. Henselmans built visual guides for men and for women in which every photograph is paired with a laboratory grade measurement taken within a few days of the picture: DXA scanning most often, sometimes hydrostatic weighing, the BodPod, or multi frequency bioelectrical impedance. His argument for doing it that way is simple. Most people carry a badly calibrated mental picture, because the numbers they were given came from skinfold calipers using the wrong equations, or from cheap single frequency scales that were never validated on athletic bodies.

The reference points he publishes are unusually concrete. Essential body fat, the amount your organs, bone marrow and nervous system need to function, sits at roughly 3 to 5 percent of bodyweight for men and 8 to 12 percent for women. Around 5 percent is the practical floor for men, the striated, dry, nothing left look. At about 8 percent a man reads as genuinely shredded. At 12 percent, abs are visible at least when flexed. And the gap between 9.6 and 10.6 percent, he points out, is essentially invisible to the naked eye, which quietly demolishes a great deal of internet argument.

He is equally direct on the health side: by his reading of the research, things begin to go wrong somewhere below roughly 5 to 13 percent for men and 12 to 16 percent for women. Those are descriptions, not targets. The guides exist so you can recognise a number, not chase one. It is the same reason any measurement only means something in context, whether that is how one size fits differently depending on the cut, the weight a boxer has to make before a title fight, or the listed height of an athlete that fans keep double checking.

There is a second reason the guides have found their moment. Feeds are full of bodies that have been lit, angled, dehydrated or generated outright by software that barely existed a few years ago, and a photograph tied to an actual scan is a rare fixed point. If you are thinking about a scan yourself, most people compare local prices first, the same homework you would do before booking any clinic appointment where the price list is not obvious.

Why is Menno trending right now?

Not because of a scandal, and not because of a single event. The mechanics are more ordinary and more interesting. The guides are evergreen, they get clipped into short videos, and the compilations built from 50 real DXA scans for men and 50 for women resurface every time somebody argues online about what 15 percent looks like. Each resurfacing pushes a wave of people towards a search box, and because they only half remember where they saw it, they type the first name.

The other half of it is that this is a question search engines handle badly. An automatic answer box can give you a definition. It cannot show you 50 photographs with scan results attached, which is precisely what the searcher came for, so the click has to land somewhere. That is the same gap that keeps people hunting for a proper explanation of an ending that a summary glossed over, or the single missing word for a crossword clue with only one right answer. At fotobreak we keep finding that the searches with the most patience behind them are the ones nobody has bothered to answer properly. Body composition also runs on a calendar, spiking with January resolutions and again in late summer, the same seasonal rhythm that carries a snack trend from nowhere to everywhere in a fortnight.

Who does he work with?

Henselmans is not a lone voice shouting into a feed. He is a co-author on a widely cited systematic review and meta analysis of protein supplementation and resistance training, published in the British Journal of Sports Medicine in 2018 alongside researchers including Brad Schoenfeld and Eric Helms, with his affiliation listed as Bayesian Bodybuilding in Gorinchem, the Netherlands. That paper, and the infographic version that followed the year after, place him inside the peer reviewed conversation rather than only commenting on it from outside.

Around that sits the wider evidence based fitness scene: researchers, coaches, and the graduates of his certification who now run their own practices and cite the method to their clients. It behaves a little like a professional guild and a little like a fandom, and its members build public profiles much the way athletes now build businesses alongside their playing careers. About his private life he says very little in public, and there is no reason for anyone to fill in the blanks.

Where can you follow Menno Henselmans?

His articles, the body fat guides included, live on his own website. He posts as menno.henselmans on Instagram and TikTok, as MennoHenselmans on X and Facebook, and runs a YouTube channel plus a podcast, Science to master your physique, on Spotify. The Science of Self-Control is sold in paperback and digital editions.

The business side is the Henselmans Personal Trainer Certification, an online course that runs in cohorts, with an intake listed for 2 October 2026 and the next one in February 2027, alongside in person seminars. What comes next is more of the same: another study read, another guide updated, another photograph tied to a number. If you take one thing from him, make it the habit rather than the figure. Track what you can actually see, whether that is the calories hiding in what you put in your coffee, the sleep quality you have been quietly ignoring, or simply a visible calendar on the wall that keeps the week honest. The percentage is only ever a description of what those habits already did. More profiles of the people the internet is currently looking up sit in our running feed of trending names and explainers.