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ShapierLab
Understand your body. Shape your progress.
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Beginner
4 min read

The explanatory videos

Nine animated videos explain the mechanisms that are hardest to picture from text alone. Each one sits alongside a written page that carries the sources, the limits and the full transcript.
Some mechanisms are easier to understand in motion. A cycle that repeats, a molecule that reassembles itself, a sequence that stretches over several hours: text describes them, animation makes them visible.
Body Lab videos are short and produced in house, from the same 3D models as the interactive scenes on the site. They are neither recordings of exercises nor clips taken from outside sources.

How a video page works

Each video is published on its own page, built to the same template.
  • The video is visible straight away, with a poster shown before it loads.
  • Chapters let you jump directly to a passage.
  • The full transcript sits below the video, and reads without starting playback.
  • Subtitles are available in French and in English.
  • Playback speed can be adjusted.
  • On mobile, the playback position is remembered locally so you can pick up where you stopped.
  • The sources, the limits and the level of certainty are displayed as on any other page.

Video, 3D scene and text

Body Lab uses three visual formats, which do not serve the same purpose.
  • The 3D scene is interactive: you turn the model, select a structure, move forward step by step. It answers the question "where".
  • The video is linear: it unrolls a sequence in time, at a pace chosen by the author. It answers the question "in what order".
  • The text carries the nuance: what is established, what is probable, what remains uncertain, and what the medium simplifies.
An animation simplifies by design. It picks a scale, a colour, a speed. Every video page therefore states explicitly what the picture leaves out and what it exaggerates for the sake of legibility.

Accessibility and graceful degradation

A video page has to stay useful without the video. The transcript is a text in its own right, not a by-product: it holds the same information, in the same order, and stays readable with a screen reader or offline.
Note
Watching is never compulsory
No information exists only in animated form. If the video does not load, if you would rather read, or if you browse the site with a screen reader, the text on the page is enough to understand the mechanism.
It is a principle applied across the whole site, 3D scenes included: a page stays complete without rich media.

How to work through the videos

The nine videos are spread across five pillars.
Each video can be watched on its own, but it makes most sense next to the written page on the same topic. The most effective approach is often to watch first, then read the page for the detail, the sources and what remains uncertain.

All the videos

Put it into practice in Shapier

Putting hypertrophy and progression into practice

Turning these mechanisms into training progression happens in Shapier; Body Lab only makes them visible on video.
Putting hypertrophy and progression into practice
Body Lab explains; Shapier lets you act and track.

The nine Body Lab videos

  • How muscle grows — the video
    An animation that follows a muscle fibre from the mechanical signal produced during effort through to the contractile proteins added over the following days. The page carries the same content in text, with its sources and the limits of the simplification.
    With a 3D scene
  • The mechanics of the squat — the video
    An animation that breaks the squat down joint by joint: hip, knee and ankle, moment arms, prime movers and the loads that change with depth. The page carries the whole thing in text, with its sources and the limits of the model.
    With a 3D scene
  • What holds a joint together — the video
    An animation comparing the shoulder and the hip, then showing what the menisci and ligaments make up for at the knee. The page repeats the content in text, with sources.
    With a 3D scene
  • The ATP–phosphocreatine system — the video
    An animation that follows one ATP molecule through a short, intense effort and then through the rest that follows: it is spent, recharged by phosphocreatine, and backed up by the other pathways. The page carries the same content in text, with its sources and limits.
    With a 3D scene
  • Lasting energy — the video
    An animation showing why ATP is recycled rather than stored, and how the share of carbohydrate and fat changes with intensity. The page repeats the content in text.
    With a 3D scene
  • Glycogen and weight swings — the video
    An animation that explains why the number on a scale moves by several hundred grams from one day to the next: muscle glycogen is stored along with water, and that water changes in quantity far faster than tissue does.
    With a 3D scene
  • Protein synthesis visualised — the video
    An animation that shows muscle as a permanent building site: proteins are broken down while others are assembled, and it is the difference between the two, repeated day after day, that decides whether the fibre gets bigger.
    With a 3D scene
  • Why it hurts two days later — the video
    An animation putting two clocks side by side: lactate, cleared in minutes, and soreness, which peaks two days later. The gap between them settles the question.
    With a 3D scene
  • Sleep and recovery — the video
    An animation that runs through a night of sleep cycle by cycle, then shows what a shortage of sleep changes in physical performance and alertness. The page carries the same content in text, with its sources and the limits of the measurements.
    With a 3D scene

Available offline

Offline download is available in the mobile app.

Trust and method

Author
equipe-editoriale-shapier
Editorial review
Thanh Chau
Scientific review
Pending
Published on
August 2, 2026
Reviewed on August 2, 2026
Next review due August 2, 2027
Limits of this page
  • This entry page presents the video format and how it works; the scientific content, its sources and its limits sit on each video page.
Educational content. Body Lab does not diagnose and does not replace professional advice.
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