Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Engage your core, drawing your navel towards your spine. Slowly rotate your upper body to one side, leading with your shoulders. Keep your hips and lower body stable, hold briefly, and return to center with control. Repeat on the opposite side.
Use slow, controlled movements. Avoid momentum; engage obliques. Relax shoulders, keep hips stable. Start with lighter resistance to ensure proper form. Exhale during rotation, inhale as you return.
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