Add the hinge pattern: Deadlift, RDL, Glute Bridge, Hip Thrust, Back Extension

The biggest hole in the coverage matrix - the hinge had zero entries in
any modality. Deadlift and Romanian Deadlift are the library's first
standing (camera.zoom) and first barbell motions.

Claude-Session: https://claude.ai/code/session_01HJDQQDA9QdP8zByg43H5v3
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2026-07-07 11:53:43 -04:00
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# Hip Thrust
The loaded glute bridge — shoulders on a bench, barbell across the hips,
drive the hips up to a straight line.
- **Category:** Main circuit
- **Type:** Free-weight hip extension
- **Targets:** Glutes, hamstrings
- **Prescription:** 4 × 810
## Setup
Sit on the floor with your upper back against a bench, the bar (padded)
across your hips, hands steadying it. Feet flat, hip-width, heels under
the knees.
## Execution
1. Brace, tuck the chin, and drive through the heels to lift the hips.
2. Stop when shoulders, hips and knees are level — a flat tabletop.
3. Squeeze the glutes at the top, then lower the hips under control.
## Cues
- Chin tucked, ribs down — the body hinges around the bench edge.
- Full lockout comes from the glutes, not from arching the back.
- Shins vertical at the top; adjust foot distance until they are.
## Common Mistakes
- Overarching the lower back instead of finishing with the glutes.
- Feet too far forward, turning it into a hamstring exercise.
- Cutting the range short at the top.
## Progression
Start with the bar alone to groove the pattern, then add plates; pause
reps at the top for extra glute work.
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