Crunch (arms straight)
Expert Advice
Keep your arms straight and parallel to your body to ensure maximum engagement of the upper abs.
How-to-do Steps
- Lie on your back with your knees bent and feet flat on the floor.
- Extend your arms straight above your chest, keeping them close to your ears.
- Contract your abs to lift your shoulder blades off the floor.
- Slowly lower back down to the starting position.
- Repeat for the desired number of repetitions.
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Muscles Worked
Crunch (arms straight) primarily targets the Abs, with Strength mechanics using Body Weight. Understanding muscle activation patterns helps you focus on proper engagement and maximize training effectiveness.
Primary

Abs100%
Equipment
Body Weight

Exercise Type
Strength
Sets & Reps Guidance
Beginner3 x 12-15
Intermediate3 x 10-12
Advanced4 x 8-10
Frequently Asked Questions
What muscles does Crunch (arms straight) work?
Crunch (arms straight) primarily targets the Abs. It is classified as a Strength exercise performed with Body Weight.
How many sets and reps should I do for Crunch (arms straight)?
For beginners, start with 3 sets of 12-15. Intermediate lifters can do 3 sets of 10-12. Advanced athletes can push to 4 sets of 8-10. Adjust based on your goals and recovery capacity.
Is Crunch (arms straight) suitable for beginners?
Yes, Crunch (arms straight) is rated as a beginner-friendly exercise, making it an excellent starting point. Focus on mastering proper form before increasing intensity or load.