after his own career, van 't hof started his own boxing gym in 1930 in the attic in west rotterdam. in 1938 he moved his boxing gym to another place in rotterdam. he trained among others national champions dorus elten and bram eversteijn. during the world war ii german bombing of rotterdam in 1940 his gym was destroyed. he continued with giving private lessons. later he started again a boxing gym inside the clubhouse of “de toekomst” in crooswijk. with help from other he got a larger boxing gym furnished with a fixed ring and warm showers. in 1974 the “herman van 't hof rotterdam boxing club” was founded and became an appreciated boxing association.