DOMS performance: pain pain, wood.
Principles and causes: muscle fiber microfiber damage + inflammatory response + metabolite accumulation + nerve endings pumping, etc.; infrequent practice + overload.
Prevention: warm-up + relaxation + massage + nutrition + take it easy + training cycle.
Relief: low intensity exercise, hot baths, massage, supplementation, and deadheading.
Correct perception: a defense signal, moderate muscle growth, transition will regress.