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A 73-year-old patient handed me a printout in March. I'd been a chiropractor for 32 years. The paper proved I'd been giving 14,000 patients the wrong advice for my entire career. Her name is on the card she sent me last month. I'm not going to use it because she didn't ask to be in this. But she walked into my office on a Tuesday in March with a printed copy of a 2003 paper from The Lancet. Kovacs et al. 313 patients. Double-blind. Randomized. She handed it to me at the end of the appointment and said: "Dr. Larson, do you have a paper that says firm is better?" I said no. I said it's just what we do. She said: "I have a paper that says it's wrong." I read it that night. The study found that medium-firm mattresses produced statistically significant pain improvements over firm mattresses in chronic low back pain patients. The paper has been replicated. The American College of Physicians cites it. Cochrane reviews cite it. Not one chiropractor I went to school with read it. Not one of the chiropractors at the conference I attended in 2009, 2014, or 2019 mentioned it. I have been telling patients to sleep on firm mattresses since 1993 because that is what my preceptor told me when I was 27 years old, and I never went back and checked. I went back through my notes. I have told approximately 14,000 patients to sleep on a firm mattress over 32 years of practice. I have prescribed seven to nine mattress brands by name. Every single one of those brands sells almost exclusively firm mattresses to back-pain patients. Every single one of those mattresses was the wrong recommendation. I called my preceptor. He is 79. He said "the Lancet thing is European, it doesn't apply to American beds." That is not what the paper says. That is what 79-year-old chiropractors tell themselves so they don't have to read 22-year-old papers. I called the head of the chiropractic association in my state. He said "we don't endorse specific products." I told him I was not asking him to endorse a product. I was asking why we are still teaching young chiropractors to recommend firm when the data on medium-firm has been settled since I was a third-year student. He did not have an answer. The mattress industry knows this. They have known it since 2003. They sell firm because firm is cheaper to manufacture, lighter to ship, and easier to mark up. A real medium-firm system requires a high-density compliant layer on top of a stable base — two layers, not one. Almost no consumer mattress brand sells that. The Japanese have built medium-firm sleep systems for 400 years. They call it the Shikibuton Method. A thin, dense base. A quilted compliant layer on top. Exactly what The Lancet would later confirm in 2003. My patient — the 73-year-old with the printout — bought a topper from a brand I had never heard of. She slept past 6am for the first time in three years on the second night. The morning of the fourth day she walked from her bedroom to her kitchen without holding onto anything. She told me she cried when she realized. She brought me a card last month. It said: "Dr. Larson, I would never have asked the question if you had not been the one chiropractor in 32 years who didn't dismiss me." I cried in my office. I have been a chiropractor for 32 years and the first time I helped this patient was when she handed me a paper. I am not writing this to recommend a product. I have no relationship with the brand. They do not know my name. I bought a topper from them last week for my wife and we are paying full retail. What I want you to do is ask your chiropractor — or your orthopedist, or whoever has been telling you to buy firm — for the paper. Ask them which RCT they are citing. Ask them if they have read Kovacs 2003. They will not have. They will tell you "we don't really cite specific studies" or "every patient is different" or some version of "trust me." That is the line. That is what I said. When you hear it you will understand what I am telling you. Not because the paper is the only reason you are in pain. But because a profession that has been telling you to sleep on the wrong surface for 22 years has not been giving you medical advice. It has been giving you a script. My wife is sleeping on the topper. I am sleeping on the topper. I am 58 and my back has not felt this good since I was 40. I am sorry it took me this long. — Dr. David Larson, DC