Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Sit with a straight spine, grounded hips (cross-legged or legs extended). Anchor your right hand palm down beside your hip. Sweep your left arm overhead, palm facing in, feeling a rib lift. Bend to the side, leading with your left fingertips toward your left hip. Move only in the frontal plane. Hold for 20-30 seconds, expanding ribs on the stretched side with each exhale. Return to center and switch sides. Repeat 2-3 rounds.
Engage your obliques to control the bend Press firmly into the opposite sit bone for stability Lengthen upwards before bending to the side Relax your neck and allow for a gentle stretch
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