He competed in four events at the 1920, 1924 and 1932 Olympics ranging from 3 to 50 km and won three gold and one bronze medals.

[3] Before the 3 km Olympic race in 1920 in Antwerp Frigerio gave pages of sheet music that he wanted to hear to the band playing at the competition venue.

During the race he would scold the conductor when the band was deviating from its tempo, and chat to the public, which eventually began to cheer him.

[6][7][8] Frigerio semi-retired after learning that race walking was excluded from the 1928 Summer Olympics.

In 1934, he wrote an autobiography titled Marciando nel nome dell’Italia (Walking in the Name of Italy).