Step by step instructions, muscle activation and variants for the Dumbbell One-Arm Starfish Crunch.
The dumbbell single-arm starfish crunch is a beginner-friendly ab exercise performed lying on the floor with one arm holding a dumbbell extended overhead and the other arm out wide. The single-arm load creates an anti-rotation demand while targeting the rectus abdominis.
The Dumbbell One-Arm Starfish Crunch is a foundational movement that builds strength and muscle through controlled, progressive overload. Train it 1 to 2 times per week with 3 to 5 working sets per session, gradually adding weight or reps as form holds up.
