Acupressure (a blend of "acupuncture" and "pressure") is an alternative medicine technique derived from acupuncture. In acupressure physical pressure is applied to acupuncture points by the hand, elbow, or with various devices. Traditional Chinese medicine's (TCM) acupuncture theory predates use of the scientific method, and has received various criticisms based on scientific thinking. The anatomical or histological basis of acupuncture points or meridians, if they actually exist, is unknown.[1] Acupuncturists tend to perceive TCM concepts in functional rather than structural terms, i.e. as being useful in guiding evaluation and care of patients.[2][3] Neuroimaging research suggests that certain acupuncture points have distinct effects that are not otherwise predictable anatomically. Acupoints used in treatment may or may not be in the same area of the body as the targeted symptom. The TCM theory for the selection of such points and their effectiveness is that they work by stimulating the meridian system to bring about relief by rebalancing yin, yang and qi (also spelled "chi"). This theory is based on the paradigm of TCM . Many East Asian martial arts also make extensive study and use of acupressure for self-defense and health purposes (chin na, tui na). The points or combinations of points are said to be used to manipulate or incapacitate an opponent. Also, martial artists regularly massage their own acupressure points in routines to remove blockages from their own meridians, claiming to thereby enhance their circulation and flexibility and keeping the points "soft" or less vulnerable to an attack. A preliminary randomized trial of Tap

s Acupressure Technique found a possible weak correlation with weight loss maintenance using TAT versus Qigong or self-directed support, suggesting that TAT might outperform the other methods studied. The results were not statistically significant, but a separation test indicated that further study is warranted.[5] A full randomized trial of TAT versus standard weightloss management intervention is currently being conducted, funded by the NCCAM.[6] An acupressure wristband that is claimed to relieve the symptoms of motion sickness and other forms of nausea provides pressure to the P6 acupuncture point, a point that has been extensively investigated.[7] The Cochrane Collaboration, a group of evidence-based medicine (EBM) reviewers, reviewed the use of P6 for nausea and vomiting, and found it to be effective for reducing post-operative nausea, but not vomiting.[8] The Cochrane review included various means of stimulating P6, including acupuncture, electro-acupuncture, transcutaneous nerve stimulation, laser stimulation, acustimulation device and acupressure; it did not comment on whether one or more forms of stimulation were more effective. EBM reviewer Bandolier said that P6 in two studies showed 52% of patients with control having a success, compared with 75% with P6.[9] One author of an article published in the Scientific Review of Alternative Medicine disagreed.[10] A Cochrane Collaboration review found that massage provided some long-term benefit for low back pain, and said: It seems that acupressure or pressure point massage techniques provide more relief than classic (Swedish) massage, although more research is needed to confirm this.