The honest summary
What the research on massage for stress supports, and where it quietly runs out.
Here's the claim that survives scrutiny. Massage may help with relaxation and everyday muscle tension, and people generally report feeling calmer for a while afterwards. The claim ends there. Everything past it — cortisol curves flattened, nervous systems reset, sleep architecture redrawn — rests on a small study repeated until it sounds settled, or on marketing copy in a lab coat.
NCCIH hedges its language, and you can see why. Its overview of the complementary approaches studied for stress is a long list of things people try and a much shorter list of things anyone can say worked. The studies tend to be small, you know perfectly well you're getting a massage, and follow-up is usually a measurement taken the same day, not a month later.
None of that makes an hour on the table worthless. It just makes the honest sentence a small one. Walk in with your shoulders around your ears and you'll usually walk out with them lower. Whether you sleep better on Thursday is a different question, and the next chapter is about how thin the answer to it is.