Magyar Testnevelési és Sporttudományi Egyetem3 June 2024 A research group of the university associated with Real Madrid verified Sonkodi’s neurogenic theory of delayed onset muscle soreness A new research finding of a Spanish research group supports the neurogenic theory of delayed onset muscle soreness (DOMS) that was put forward by Dr Balázs Sonkodi, senior research associate of the Hungarian University of Sports Science.