He competed in the 3000 metres team race at the 1924 Summer Olympics, along with teammates Haakon Jansen, Nils Andersen and Hans Gundhus.
Running in 31:41.7 minutes at Østerbro stadion, he overcame Alf Halstvedt's old record by fourteen seconds.
During the race in Stockholm, Badendyck also posted a record time in the 20,000 metres, but it was not sanctioned.
[6] One additional Norwegian record was set with his clubmates in BUL, that in the 4 x 1500 metres relay.
In 1926 at Bislett stadion the team beat Grane's old record with a 17:22.5 minute posting.