A brief look at the differences in "stress" and "strain" helps one to understand posture distortion.
STRESSES: These are pressures the body is subjected to, usually for short periods of time, which push the system beyond its normal limits. With rest, the body can usually return to normalcy. These brief periods of taxing the body beyond its normal limits, such as prudent exercise, are called the "elastic limit." It usually leads to growth and strength.
STRAIN: This occurs when the body is pushed beyond its "elastic limit," sometimes suddenly, sometimes gradually. The function and tone of muscles and organs is damaged and there are permanent changes within the tissue. Because the body is unable to recover strain without help it cannot rest. The eventual result of strain can be disease or even death. Some of the causes of strain include blows, infections, surgical shock or emotional distress.
