BIOFEEDBACK—HOW IT WORKS When I attended health fairs in the past, I often came across booths featuring biofeedback devices. Exhibitors would invite visitors to try a brief session—measuring things like heart-rate variability or breath control—to demonstrate how the technology worked. I joined in a few times just for fun, but I never seriously explored it as a way to manage bodily functions. Recently though, I’ve noticed more articles from respected sources like the Mayo Clinic and Harvard Medical School recommending biofeedback, particularly for pain relief. I selected one in particular because it’s concise yet informative, providing a practical introduction to...