I saw that recently in a video about food in Japan. Japanese people going to Western countries and gaining like 25 pounds in a couple of months, then returning to Japan and shedding it within weeks.
Sugar content, portion size, nutrition vs empty calories and other factors…
One of my colleagues had an issue with a pectoral muscle that caused it to cramp often. He would massage it when it cramped up. Purely a physical issue with the muscle. One day he caused a minor stir in the cafeteria at a client site as he grimaced and clenched his chest. My colleagues and I had some explaining to do, since by all appearances there were three people telling a person in cardiac distress that he should just rub some tiger balm on it and suck it up, like a man.