Starfish Crunch

Full body crunch hitting obliques and rectus abdominis. Connect opposite limbs with precision.

Instructions

• Lie flat in X shape (arms/legs wide).
• Crunch up to touch opposite hand to foot.
• Lift shoulder blade off floor.
• Alternate sides.
• Control completely (no flopping).

Common Mistakes

• Not lifting shoulder
• Bending knee/elbow excessively
• Using momentum
• Not resetting to X

Benefits

• Obliques
• Total Core Integration
• Flexibility

Biomechanical Form Guide

Fitness & AI Biomechanics Guides Hub - Comprehensive educational guides on exercise biomechanics, 3D computer vision pose estimation, injury prevention, and progressive overload strength training.

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