01 Start
Scroll to lift.
One glute bridge, computed by a biomechanical model — not filmed. Lie on your back and set up before the hips move.
- Lie on back, knees bent, feet flat
- Feet hip-width, close enough to touch heels
- Arms relaxed at your sides
- Exhale and brace before lifting
02 The lift
The hips rise.
Drive through the heels and the pelvis traces this arc. The glowing trail is the pelvis joint's real path, sampled straight from the engine.
- Drive through the heels
- Squeeze the glutes at the top
- Straight line from knees to shoulders
03 What stays planted
The feet never move.
Hands and feet stay pinned to the floor. Their joint angles aren't drawn by hand — they're solved by inverse kinematics so contact holds for any body proportion.
04 Working
What does the work.
Relative emphasis — clinically authored estimates, not EMG.
05 Top
Hold it at the top.
That's one rep. Now scrub it, rotate the camera, change the body — or drive it yourself.
Same engine, sixty-five ways
One movement each. Shown at its peak.
Every figure below is the same kind of computed motion, frozen at mid-rep. Open any one for the full player — scrub, orbit, switch the render style, change the body.
Your turn on the floor.
Browse by where it hurts, build a routine, or pose the skeleton yourself. No account, nothing to install — the whole thing lives in a link.