Incorrect execution of physical exercises, introduction of new elements into the training process, poor quality warm-up, and adverse training conditions (improper temperature, humidity, etc.) contribute to micro-damage in muscles.
The American physiologist Theodor Hough, who first described the syndrome in 1902, attributed it to damage to muscle tissue elements. Myocytes, or muscle cells, involved in exercise, get damaged, resulting in microtraumas. However, the exact mechanism of DOMS development is not fully understood. The soreness develops from intensive rhythmic, abrupt muscle contractions without notable fatigue.
Rhabdomyolysis, or acute necrosis of skeletal muscles, represents the extreme manifestation of delayed onset muscle soreness. It develops after training predominantly with eccentric exercises (where muscle elements lengthen) in untrained athletes who have not previously performed such physical activities. Poorly conducted warm-ups and high environmental temperatures are factors that contribute to the development of rhabdomyolysis.