Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Stand with feet hip-width apart, arms at sides. Engage core, chest up. Bounce off the balls of your feet, knees slightly bent. Propel upward quickly with minimal knee bend. Land softly, rebounding immediately. Maintain a steady, controlled rhythm.
Engage your core for balance. Land softly to protect joints. Use arms for rhythm and balance. Start with a small range of motion. Keep knees slightly bent to absorb shock. Perform on a flat, stable surface.
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