Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Stand with feet wider than shoulder-width, barbell across your upper back (overhand grip). Chest up, core engaged. Shift weight to one leg, bending the knee and lowering hips into a squat on that side, keeping the opposite leg straight. Knee tracks over toes. Lower as far as flexibility allows, heel flat. Pause, then push through heel to return. Alternate sides.
Maintain an upright torso. Keep core tight to stabilize spine. Knees aligned with toes. Start with lighter weight. Warm up thoroughly. Check form with a mirror or recording.
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