About 10 years ago, there was a NIH (U.S. National Institute of Health) article published about a study done by Israel and Greece medical professionals of nursing home patients bothered with mostly constipation and indigestion. For 20 minutes a day, while sitting, the patients wore a massager that worked on their abdomen. After 6 weeks, 85 percent of the patients reported less gas, bloating, and constipation. I purchased a neck massager (the closest I could find to the massager the researchers used) and tried it. It seemed like it started working after the first couple of weeks and then stopped working. (Which is the reason that I sometimes think my digestive problems are emotion-related. Or maybe I just fell in that 15 percent the study didn't help; lucky me.)