Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Stand gripping upside-down kettlebell horns. Raise to eye level, neutral spine. Slow circle around head (stable torso). Repeat both directions.
Neutral head (no jut). Stable spine—no extension behind head. Arms only—no torso/hip rotation. Mobility focus—light weight, no ego/PRs.
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