Crunch (exercise)

Performing the crunch

The crunch or curl-up is an abdominal exercise that works the rectus abdominis muscle.[1] It enables both building and defining "six-pack" abs and tightening the belly. Crunches use the exerciser's own body weight to tone muscle and are recommended by some experts[like whom?], despite negative research results[citation needed], as a low-cost exercise that can be performed at home.[2] Crunches are less effective than other exercises such as planks and carry risk of back injury.[3]

  1. ^ "Core Anatomy: Muscles of the Core". www.acefitness.org. Retrieved 2022-03-28.
  2. ^ "Exercising on a budget". MedlinePlus Medical Encyclopedia. Retrieved 20 April 2020.
  3. ^ Cite error: The named reference atlantic was invoked but never defined (see the help page).