Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Start in a forearm plank, elbows under shoulders, body in a straight line from head to heels. Have a partner center a weight plate on your lower back. Maintain a tight core and straight line while holding. Remove the weight and lower to knees.
Begin with a lighter weight. Keep hips level, engage glutes and quads. Breathe steadily. Stop if you feel lower back discomfort.
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