Crunches

She prefers doing crunches over sit-ups because they're easier on her back.

The crunches of the broken glass made me cringe.

She struggled to complete a set of crunches due to her weak abdominal muscles.

The hiker crunches on some nuts while taking a break.

He incorporated crunches into his daily exercise routine to achieve his fitness goals.

She did 20 crunches as part of her morning workout.