Crunches

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

The crunches of the gravel under the car's wheels filled the air.

The gravel crunches as the car drives up the driveway.

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

He crunches the gravel beneath his tires as he drives down the dirt road.

He crunches the popcorn in his mouth at the movie theater.

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

She did 20 crunches as part of her morning workout.