One of the most important standards that the API has set is the method used for measuring the density of petroleum. This standard is called the API gravity. Specific gravity is a ratio of the density of one substance to the density of a reference substance, usually water.
The most common symptoms of RSI include: 1  Pain. 2  Tingling. 3  A feeling of restlessness in the joint. 4  Weakness. 5  Throbbing. 6  Stiffness or cramp.
Sarno's protocol for treatment of TMS is used by the Harvard RSI Action Group, a student volunteer organization, as part of their preventative education and support program for people with repetitive strain injury, also referred to as RSI.ack pain is frequently mentioned as a TMS symptom, but Sarno defines TMS symptoms much more broadly than that: 1  Symptom type: TMS symptoms include pain, stiffness, weakness, tingling, numbness and other negative sensations, according to Sarno.