Sorensess and pain in muscels after vigrous exercise is due to ?

Ans. is'b'i.e., Lactic acidosis[Rel Exercise physiology p. 535)Immediate -onset Soreness is characterized by pain during and immediately after exercise,This type of soreness is thought to be caused by stimulation of pain receptors by metabolic by-products of cellular respiration, especially H+ associated with increased lactic acid levels.