Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Start in a high plank, hands under shoulders, body in a straight line. Engage your core and maintain balance. Lift one leg straight, driving the foot towards the ceiling, keeping it straight and engaging your glutes. Pause briefly at the top, feeling the contraction in your glutes, hamstrings, and lower back. Lower the leg with control, breathing in as you lower and out as you lift.
Maintain a neutral spine and neck Keep your torso stable and hips squared Extend your leg fully, keeping your knee straight Coordinate your breath with each repetition
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