But there are also people on the other extreme of the spectrum who live in a perpetual state of worry and suffering and rumination about having a serious illness,” he told AP.

Source: https://www.mirror.co.uk/news/health/being-hypochondriac-kill-you-faster-31718214

EEG recordings revealed that reindeer's brainwaves during rumination resemble the brain waves present during non-REM sleep, and these brainwave patterns suggest that the reindeer are more "rested" after ruminating.

Source: https://phys.org/news/2023-12-reindeer-cud-strategy-summer.html

It would be easy to label a one-woman show, since Elsa Dougherty stands front and center before the audience, and—through a series of songs, impressions, and digressions—appears to be recounting a deeply personal rumination about her own love life.

Source: https://www.portlandmercury.com/Theater/2023/12/15/46930615/theater-preview-im-in-control-which-means-nothing-bad-will-ever-happen-to-me

Studies show these repeated workouts improve attention skills and decrease rumination, or repeated negative thinking.

Source: https://businessmirror.com.ph/2023/05/15/mindfulness-meditation-and-self-compassion-a-clinical-psychologist-explains-how-these-science-backed-practices-can-improve-mental-health/

The statement paves the way for years of rumination about their thorny relationship, explored throughout this slender, powerful autobiography.

Source: https://tbrnewsmedia.com/book-review-two-faces-of-the-moon-a-small-island-memoir/