Interactive muscle map

See exactly what every machine trains.

Muscle map, front and back view FRONT BACK

Primary Secondary Stabilizer

Pick a machine and watch the muscles light up in order of effort — primary movers first, then helpers, then stabilizers. Free, no signup, works on any phone.

18Muscles mapped
8Machines live
139Reviews re-filed

Tools, not articles.

Any AI can restate a spec sheet. None of them can let you pick a machine and watch a muscle respond. That difference is the whole point of this site.

All free tools →
Live now

Muscle map

Pick a machine, see exactly which muscles do the work.

Open the muscle tool →
Next up

Machine finder

Start from the muscle you want to train, work backwards to the machine.

Next up

Strength calculator

Estimate your working weight without guessing at the rack.

Next up

Form check

The mistakes people actually make on each machine, side by side.

Live now

HYROX gear guide

The fastest-growing race on earth. Which sled, ball and bag to train with — all rated on one scale.

Open the HYROX guide →

Every machine, mapped.

Starting with the equipment you will actually find in a commercial gym. Tap one to load it into the map above.

Every machine, named →

Read the long version.

139 reviews and guides, reshelved by what you are trying to do — not by what aisle the product sits in.

How we keep this honest.

Most equipment sites are a spec sheet with affiliate links stapled on. These are the three rules that keep this one from becoming that.

Anatomy you can verify

Muscle names follow standard anatomical terminology, and the activation levels are drawn from published resistance-training literature. If something looks wrong, check it against any anatomy atlas — we would rather be corrected than trusted blindly.

18 muscle groups · front and back views

Honest about age

Every review carries the date it was last checked, and products that have been discontinued are labelled as such instead of quietly left online. A 2020 review that never got updated is not a review — it is a trap.

139 reviews · last audited September 2026

Commission never decides

We earn a commission when you buy through some links. It never changes a recommendation — some of the products we rate highest pay us nothing at all, and we say so on the page.

Full disclosure on every page