Very Interesting research by TC-Japan. I have experienced similar positive beneficial results on my health and particularly improvements in my Rheumatoid Arthritis ( RH) from my last 4 years of climbing. Decrease in inflamation, more flexibility, better coordination and improvement in mood and positive feelings of well being. I realize that this is empiric in nature and it is hard to test or prove but that is my story and sticking to it! It helps me justify the cost of gear for medical reasons! he, he, he.