Seated Machine Trunk Rotation
Reviewed by Bryan Cortez, MS
Rotate the trunk while the pelvis stays quiet.
Demonstration
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Physique Skool is filming one canonical demonstration per exercise. Until this movement is published, use the setup, execution, common errors, programming, and substitutions below.
Browse Physique Skool on YouTubeHow to do it
Setup
- Set the seat and pads to secure the hips
- Sit tall with ribs stacked over pelvis
- Grip or brace against the upper-body pads
- Choose a moderate start angle
Execution
- Rotate the rib cage against the resistance
- Keep hips and knees still
- Pause at the controlled end position
- Return without letting the stack pull you
Common Errors
- Twisting through the hips
- Using momentum into end range
- Shortening one side
- Chasing load instead of controlled rotation
Cues That Work
- Turn the rib cage; freeze the belt buckle; brake the return
No-Fly Zone
Avoid fast, forced end-range rotation or loads that make the hips leave the seat.
Programming
Sequence priority
Late
Direct trunk work belongs after lifts that need fresh bracing and is easy to dose near the end of a session.
Progression
Model — Double
Fallback model — Density
Match range and tempo on both sides; progress the weaker side by reps before adding one pin step for both.
Best program fit
Full body
Load increments
If it hurts
Pain is information, not a challenge to push through. Stop the set if pain is sharp, worsening, or changes how you move. These are exercise-selection options, not medical diagnosis or rehabilitation advice.
Work down this list in order. Stop at the first change that removes the pain.
Step 1
Setup tweaks
Reduce the start angle or adjust the pad position until the hips stay fixed.
Step 2
ROM / tempo / bias
Use a two-second return or a one-second controlled end-range pause.
Step 3
Implement swap
High-to-low cable chop or a cable seated twist.
Substitutions
Approved fallback
High-to-low cable chop or a cable seated twist.
The Evidence
This is a repeatable way to load trunk rotation. It does not prove that loaded rotation is appropriate for every back history or that more range is always better.
SFR — 2.7
Put the exercise inside a system.
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