Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Sit on a bench with upper back supported, knees bent, feet flat. Hold a dumbbell horizontally across your hips. Engage core, drive through heels to lift hips, forming a straight line from shoulders to knees. Squeeze glutes and hold. Slowly lower back to starting position without touching the ground. Repeat.
Press upper back firmly into the bench for stability. Tuck chin to maintain neutral spine. Focus on squeezing glutes at the top. Avoid lower back arching; engage core. Start with a lighter dumbbell. Control the entire movement.
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