He was born in Budapest on 4 February 1930. His parents were István Antalpéter and Viktória Dobai. He married Adél Mátha in 1956. They had two daughters: Katalin (b. 1958) and Sára (b. 1961).
He served as coach of the adult team of Csepel SC between 1960 and 1969 which won the National Championship twice. He was a Board Member of the Hungarian Volleyball Federation since 1966. He functioned as leader of the Coaches' Committee from 1966 to 1970. He served as Vice President (1970–1973) then President (1981–1986) of the Federation. He was also a member of the Hungarian Olympic Committee between 1980 and 1986.