Trunk Control
A practical movement guide for every Mission SOP that uses this exercise. Sets, reps, load, tempo, and purpose remain specific to each mission and phase.
Movement guide availableAnatomy map
The movement remains available for planning and tracking while its ShaOS anatomy illustration is reviewed.
No anatomy image is published until the ShaOS model has been reviewed.
A supine anti-extension hold that builds the trunk position used in strict calisthenics while allowing clear lever-length regressions.
Movement media
The written setup, cues, and alternatives remain the current technique reference while the tutorial is produced.
Accessible movement summary
Lie on your back and bring the knees toward the chest with the arms reaching beside the thighs. Exhale to bring the ribs toward the pelvis and lift the shoulder blades slightly from the floor. Extend the legs or reach the arms overhead only as far as the lower back stays comfortably connected to the floor. Hold with steady breathing, then tuck the knees to end the set before trunk position changes.
Key cue: Shorten the lever before your back arches.
The production indicators above are roadmap states, not claims that multi-angle footage, overlays, captions, or a narrated transcript are already available.
Adapt the movement
Preserve the movement pattern while matching current capacity, available equipment, and the mission environment.
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