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Learn what builds strength

The research behind every post we share, written up in full.

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Losing fatFive common beliefs about losing fat all leave out the same thing, and it is muscle

Genes, eating less, a slow metabolism, more cardio and eating clean: what the research says about each, and the part they all miss.

27 Oct 2026
ProteinTimes your weight in kg by 1.2 to find the protein that keeps your muscle

How much protein keeps your muscle as you age, how much builds more, and what that is in grams for your weight.

27 Oct 2026
Losing fatStrength training takes the same fat off as cardio, and it keeps your muscle

The same fat came off with cardio or strength training, and the strength group kept more of their lean mass and bone.

27 Oct 2026
Strength trainingProtein will not stop the ache after training, but it is what your muscle repairs itself with

Why muscles ache for days after training, what protein can and cannot do about it, and how to eat before and after a session.

23 Oct 2026
Losing fatThe year after stopping GLP-1 medication is the part the ads never show

What the GLP-1 trials found about lean mass, and about the year after people stopped the medication.

19 Oct 2026
Strength trainingA ten-year study of twins found that leg power and the brain are linked

What a ten-year twin study found about leg power and the brain, why a link is not proof, and what the training trials show.

15 Oct 2026
Strength trainingSarcopenia is the muscle you've been losing since 30

What sarcopenia is, how it shows up long before you see it, and the two things the research says help.

11 Oct 2026
ProteinMany of us are short on protein, and it can show up as snacking between meals

Where the seven in ten figure comes from, who was studied, and what research says about low protein and snacking.

7 Oct 2026
ProteinThis is what 30 g of protein looks like on the plates you already order

Some everyday plates get you there easily, and some fall short without you noticing.

3 Oct 2026

Frequently asked questions

What is Learn?

Short articles on the three things that keep you strong as you age: eating enough protein, lifting something a few times a week, and losing fat without losing muscle. Each one is written from published research and says where its numbers come from.

How often do new articles come out?

Every Instagram post gets a matching article here the same day, so expect something new most weeks. The latest ones sit at the top of this page.

Do I need the app to use this?

No. The articles stand on their own, and the calculator works out your daily protein, calories, BMR and TDEE without an account.

Are the claims backed by research?

Yes. Every figure links to the trial or review it came from, and where the evidence is mixed the article says so rather than picking a side.

Who is this written for?

Adults from thirty up who want to be strong at eighty: the people losing a little muscle every year without noticing. If you have never lifted anything, start with the strength training section; it begins at the first session.

Work out your daily numbers

Our free calculator works out your resting rate, your maintenance calories and your protein target.