It typically takes at least 30 years from a finding to becoming medicine. First it needs to reach sufficient consensus that it starts getting taught in medical

It typically takes at least 30 years from a finding to becoming medicine. First it needs to reach sufficient consensus that it starts getting taught in medical school once that happens it then takes 10 years to become common place for it to be taught and then 10-20 for those students to become consultants and be in the position to dictate how a treatment is applied. Sometimes some findings can take a long time to get into textbooks or the textbooks on a topic to get updated and the initial stages take longer. But 30 years is about the best medicine can currently achieve in any volume. I don't necessarily know if such consensus has been reached for return to normal with concussions, psychology and exercise researchers are trying to make Cognitive behavioural therapy and exercise and a general appeal to nature as the solution to everything in medicine at the moment and there is a lot of bad studies with low or very low quality results on that basis. I haven't followed concussion research so I don't know if that is what is happening here but I suspect its likely. I would just be aware that a lot of the replication crisis with medical research is due to this effect so you have to look at the studies and be aware of the alternatives.