Side-To-Side Crunch with Arm Extended
The Side-To-Side Crunch with Arm Extended mainly works the core. No equipment needed: it uses just your bodyweight.
Optional Equipment

Side-To-Side Crunch with Arm Extended Muscles Worked
Primary
Obliques
Secondary
Abdominals (rectus abdominis)
How to do the Side-To-Side Crunch with Arm Extended
Setup
Lie on your back on a mat with your knees bent and feet flat on the floor.
Position your feet hip-width apart.
Raise your shoulder blades slightly off the ground by engaging your core, keeping your neck neutral.
Movement
With your arms extended at your sides, crunch your torso to the right, attempting to reach toward your right heel.
Return to the center position while keeping your upper back elevated.
Immediately crunch your torso to the left, reaching towards your left heel.
Continue oscillating from side to side in a controlled motion.
Tips
Focus on using your obliques to initiate the side-to-side movement.
Keep your lower back pressed firmly into the floor throughout the entire movement.
Avoid pulling on your neck; focus the effort on your abdominal muscles.
Side-To-Side Crunch with Arm Extended FAQs
What muscles does the Side-To-Side Crunch with Arm Extended work?
The Side-To-Side Crunch with Arm Extended mainly works the core. The main muscles are the obliques.
What equipment do you need for the Side-To-Side Crunch with Arm Extended?
None. The Side-To-Side Crunch with Arm Extended is a bodyweight exercise, so you can do it anywhere.
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