Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Stand facing a box, feet hip-width apart. Extend one leg forward, keeping it straight. Engage your core, maintain posture. Lower your body by bending the standing leg's knee, pushing hips back until glutes lightly touch the box. Pause briefly. Press through the standing leg's heel to return to start. Repeat on both legs.
Keep your knee tracking over your toes. Maintain an upright chest and shoulders. Choose a box height that allows for controlled form. Engage your core for balance. Start with a higher box and gradually decrease height as you improve. Perform slowly for maximum muscle engagement.
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