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. Position feet hip-width apart, shins vertical when hips are lifted. Rest arms for stability. Engage core, squeeze glutes, lift hips until body forms a straight line from shoulders to knees. Hold, contracting glutes. Slowly lower hips without touching the ground. Repeat.
Position feet directly under knees at the top. Focus on glute contraction. Maintain core engagement. Distribute foot pressure evenly. Control movement throughout.
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