Fitness is a free exercise library that shows how each movement should look, with 3D form demos on six body types. Each page also explains the research behind its form cues. You don’t need to sign up.
Who Fitness is for
Fitness is for people who train and want to check their form against a clear demo, and for anyone curious about which muscles an exercise works. Each page explains the research behind its cues, so you can see why the advice is given.
What’s in the exercise library
- 3D form demos. You can watch each exercise from four camera angles on six body types. The first live movements are flat and incline chest presses, such as the dumbbell bench press. Nine more movement families, including squats, rows and overhead presses, are marked as coming soon.
- Muscle map. A 2D map of 23 selectable muscles, with an optional 3D view.
- Workout splits. Push/pull/legs, upper/lower, full body and body-part splits.
- Articles. Explainers, such as how to read the 3D demos.
How each exercise page is made
Each exercise starts as a research document in which every claim has a source and a certainty level. That document is checked against the site’s editorial policy, then turned into the page and the motion data for the demo.
Who made it, and its limits
I’m a software engineer who trains with a push/pull/legs split. I’m not a clinician, physiotherapist or certified coach. No page has had professional review yet. Each page shows when I last checked it, and a qualified reviewer’s name and credential will be added once one has checked it. The site is general education, not medical advice.
Credits
The 3D figures are built from the MakeHuman base mesh (CC0 1.0) and animated in the browser with three.js. The anatomy models are adapted from Z-Anatomy and BodyParts3D under CC BY-SA 4.0.
Frequently asked questions
Is the exercise library free?
Yes, and you don’t need to sign up.
Which exercises have 3D demos?
The first live movements are flat and incline chest presses. Nine more movement families, including squats, rows and overhead presses, are marked as coming soon.
Has a professional reviewed the content?
Not yet. Each page shows when I last checked it, and a qualified reviewer’s name and credential will be added once one has checked it.
Is this medical advice?
No. Fitness is general education. Read the medical disclaimer, and ask a qualified professional about injuries or health conditions.
Explore Fitness
- Browse the exercise library
- Explore the muscle map
- Compare workout splits
- Read the medical disclaimer
- Another project built on checkable sources: WebTools calculators