Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Lie on your back, keeping your upper back and heels on the floor while pressing your palms down for stability. Engage your core to maintain lower back contact and lift your heels, then draw your knees to your chest, extending your legs back down without letting them touch the ground. This exercise targets your hamstrings and glutes.
Keep your lower back pressed against the floor to protect your spine. Execute the movement slowly and with control. Actively engage your abdominal muscles throughout. Manage the motion during both the lifting and lowering portions. Exhale as you lower your legs.
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