Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Engage your core, drawing your belly button towards your spine. Squeeze your glutes to stabilize your pelvis. Keep your head neutral, focusing on the floor. Breathe steadily while holding.
Maintain a straight line to protect your lower back. Squeeze glutes and quads for stability. Breathe steadily. Adjust position or reduce hold time if lower back discomfort arises. Start with shorter holds, increase duration gradually.
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