Three core research papers have been written on the effectiveness of acupressure mats. You can access all three papers in the links below and we have highlighted the most exciting findings.
This study involved 36 participants with long term neck and back tension
Swedish clinical trial involving 32 participants
The Wall Street Journal published an article about acupressure mats also:
"...Research on nail mats so far is preliminary, scientists say. A Shakti-funded study, published earlier this year in the Journal of Alternative and Complementary Medicine, tested heart rate, body temperature and other physical reactions to the "nail" mat compared with a soft bed in 32 healthy volunteers during three 20-minute sessions.
Back temperature was higher on the nail mat than on the soft bed—indicating increasing circulation, says study co-author Erik Olsson, who worked on the study at a Swedish rehabilitation clinic and is now a researcher at Uppsala University in Sweden. Heart rate slowed and was more variable on the Shakti mat—signs the body's parasympathetic nervous system, responsible for relaxation, was activated, he adds. Since the participants were all healthy, the study didn't measure if there were any health benefits. Dr. Olsson says further study would be needed to determine if endorphins are produced.