Get Shredded Obliques: The Correct Side Crunch Technique
Summary
Jeff Cavaliere of ATHLEAN-X explains how to develop visible, defined obliques — often described as “fish gill” lines along the sides of the torso. He emphasizes that everyone already has obliques, and the key to making them visible is a combination of proper nutrition and training the muscle correctly. The video focuses on fixing the commonly butchered Side Crunch exercise to maximize oblique activation.
Key Points
- Everyone has obliques — genetics are not an excuse for their absence; the goal is to uncover and develop what’s already there
- Nutrition is non-negotiable — without a proper diet, obliques will remain hidden regardless of how hard you train them
- The oblique has two functions: spinal flexion and rotation toward the opposite side — both must be incorporated into training
- The Side Crunch is an effective, equipment-free oblique exercise suitable for home training
- Range of motion is smaller than most people think — the effective work happens at the top of the movement, not by swinging the elbow toward the hip
- Quality of contraction matters more than distance traveled — reaching point B means nothing if the target muscle isn’t under proper muscular tension throughout the movement
- Yanking on the neck is a common compensatory error that shifts stress away from the obliques and causes discomfort
Exercise Details
Side Crunch (with Rotational Component)
Target Muscles
- Obliques (primary)
Proper Form Cues
- Focus the movement at the top of the range, not on achieving maximum distance
- As you flex laterally, incorporate a slight rotation toward the opposite side to match the oblique’s natural rotational function
- Perform the movement slowly and with control, emphasizing the contraction of the oblique at the peak
- Keep the motion small and deliberate — the goal is muscle tension, not elbow-to-hip contact
Common Mistakes to Avoid
- Trying to touch the elbow to the hip — this shifts focus away from the muscle
- Lifting the entire torso excessively off the floor
- Pulling or yanking on the neck to “shorten” the distance, which causes neck strain and removes tension from the obliques
- Treating it as a pure lateral flexion movement without any rotational component
Sets/Reps
- No specific sets or reps were mentioned in this video