He received a silver medal at the
1936 Winter Olympics in
Garmisch-Partenkirchen. It was later noted that gold medallist
Ivar Ballangrud probably was clocked in a second too early, something which could have cost Krog the gold medal. At the 1937
World Allround Speed Skating Championships Krog won the 500 m distance in 42.9 seconds. He represented the clubs
Drammens SK,
Gimsøy IF and
Oslo SK. After his speed skating career he worked as a barrister. ==References==