structural:reformatting, structural:expansion
Later life

While active as a runner, Nurmi was known to be secretive about his training methods. Always running alone, he upped his pace and quickly exhausted anyone who was bold enough to join him. Even his club mate Harri Larva had learned little from him. After ending his career, Nurmi became a coach for the Finnish Athletics Federation and trained runners for the 1936 Summer Olympics in Berlin. In 1935, Nurmi along with the entire board of directors quit the federation after a heated 40–38 vote to resume athletic relations with Sweden. However, Nurmi returned to coaching three months later and the Finnish distance runners went on to take three gold medals, three silvers and a bronze at the Games. In 1936, Nurmi also opened a men's clothing store (haberdashery) in Helsinki. It became a popular tourist attraction, and Emil Zátopek was among those who visited the store trying to meet Nurmi. The Finn spent his time in the back room, running another new business venture; construction. As a contractor, Nurmi built forty apartment buildings in Helsinki with about a hundred flats in each. Within five years, he was rated a millionaire. His fiercest rival Ritola ended up living in one of Nurmi's flats, at half price. Nurmi also made money on the stock market, eventually becoming one of Finland's richest people.

In February 1940, during the Winter War between Finland and the Soviet Union, Nurmi returned to the United States with his protégé Taisto Mäki, who had become the first man to run the 10,000 m under 30 minutes, to raise funds and rally support to the Finnish cause. The relief drive, directed by former president Herbert Hoover, included a coast-to-coast tour by Nurmi and Mäki. Hoover welcomed the two as "ambassadors of the greatest sporting nation in the world." While in San Francisco, Nurmi received news that one of his apprentices, 1936 Olympic champion Gunnar Höckert, had been killed in action. Nurmi left for Finland in late April, and later served in the Continuation War in a delivery company and as a trainer in the military staff. Before he was discharged in January 1942, Nurmi was promoted first to a staff sergeant (ylikersantti) and later to a sergeant first class (vääpeli).

In 1952, Nurmi was persuaded by Urho Kekkonen, Prime Minister of Finland and former chairman of the Finnish Athletics Federation, to carry the Olympic torch into the Olympic Stadium at the 1952 Summer Olympics in Helsinki. His appearance astonished the spectators, and Sports Illustrated wrote that "his celebrated stride was unmistakable to the crowd. When he came into view, waves of sound began to build throughout the stadium, rising to a roar, then to a thunder. When the national teams, assembled in formation on the infield, saw the flowing figure of Nurmi, they broke ranks like excited schoolchildren, dashing toward the edge of the track." After lighting the flame in the Olympic Cauldron, Nurmi passed the torch to his idol Kolehmainen, who lighted the beacon in the tower. In the cancelled 1940 Summer Olympics, Nurmi had been planned to lead a group of fifty Finnish gold medal winners.

Nurmi felt that he got too much credit as an athlete and too little as a businessman, but his interest in running never died. He even returned to the track himself a few times. In 1946, he faced his old rival Edvin Wide in Stockholm in a benefit for the victims of the Greek Civil War. Nurmi ran for the last time on 18 February 1966 at the Madison Square Garden, invited by the New York Athletic Club. In 1962, Nurmi predicted that wealthier countries would start to struggle in the distance events: "The higher the standard of living in a country, the weaker the results often are in the events which call for work and trouble. I would like to warn this new generation: 'Do not let this comfortable life make you lazy. Do not let the new means of transport kill your instinct for physical exercise. Too many young people get used to driving in a car even for small distances.'" In 1966, he took the microphone in front of 300 sports club guests and criticised the state of distance running in Finland, reproaching the sports executives as publicity seekers and tourists, and demanding athletes sacrifice everything to accomplish something. Nurmi lived to see the renaissance of Finnish running in the 1970s, led by athletes such as the 1972 Olympic gold medalists Lasse Virén and Pekka Vasala. He had complimented the running style of Virén, and advised Vasala to concentrate on Kipchoge Keino.

Although he accepted an invitation from President Lyndon B. Johnson to revisit the White House in 1964, Nurmi lived a very secluded life until the late 1960s when he began granting some press interviews. On his 70th birthday, Nurmi agreed to an interview for Yle, Finland's national public-broadcasting company, only after learning that President Kekkonen would act as the interviewer. Suffering from health problems, with at least one heart attack, a stroke and failing eyesight, Nurmi at times spoke bitterly about sports, calling it a waste of time compared to science and art. He died in 1973 in Helsinki and was given a state funeral. Kekkonen attended the funeral and praised Nurmi: "People explore the horizons for a successor. But none comes and none will, for his class is extinguished with him." At the request of Nurmi, who enjoyed classical music and played the violin, Konsta Jylhä 's Vaiennut viulu (The Silenced Violin) was played during the ceremony. Nurmi's last record fell in 1996; his 1925 world record for the indoor 2000 m lasted as the Finnish national record for 71 years.