In 1911 the part at the Swedish Championships won Kugelberg Decathlon. A year later, he took part in the Olympic Games of Stockholm. He represented Sweden in thepentathlon and Decathlon components. At the Pentathlon he was fifteenth overall, because he only three components successfully. At the Decathlon fared him better and he was seventh with 6758.780 points. The race was won by American Jim Thorpe, the world record that improved to 8412.955 points.
- Swedish Champion Decathlon-1911
- 1912: 15th OS-1982,875 (based on 3 items)
- 1912: 7th OS-6758,780