Miki Shirakawa's neck and shoulder warmer The neck and the autonomic nerve are closely related.
For many years, clinics have also used semiconductor laser irradiation near the stellate ganglion for the purpose of autonomic nerve stabilization.
Autonomic nerve function measurement has been introduced in the United States Department of Defense, Space Development, Ministry of Defense-related facilities, and university medical departments in many studies. Comments on the analysis of autonomic function tests are also posted. It is also used for coaching top athletes such as racing drivers and tour pros. The contents are very easy to understand. I think the material of the warmer is very nice for the price. I hope you can see it.