The world's oldest Olympic champion Leon Stukelj of Slovenia died of a heart-attack Monday only four days syh of his 101st birthday.

Stukelj, six-time gymnastics Olympic medalist, called an ambulance from his north-Slovenian home in Maribor after feeling pains around his heart. His heart expired early Monday, according to STA Slovenian news agency.

Stukelj won Olympic golds in the horizontal bar and all-around competition at Paris in 1924. He won another gold in the rings at Amsterdam in 1928. He also won two bronze medals at Amsterdam and a silver in the rings at Berlin in 1936.

Stukelj went on to work as a judge and wrote books on gymnastics. He kept up his health by working out on rings in his apartment and by taking hour-long walks in a nearby park.