Sports
Roberto Fonseca: Late Start and Transition to Triathlon
With no competitive background as a kid, he took up cycling near 40 and swapped soccer for endurance racing.
Roberto Fonseca looks back on his casual start in triathlon after years of balancing surfing, rowing, and pickup soccer. Discover how he built his foundation and fully committed to endurance sports.
Many who follow Roberto Fonseca's elite performances in long-distance races assume he has a background as a competitive athlete since childhood. However, his journey began far from race tracks and competitive rigor. In a conversation on the Café com Tri podcast (powered by Stemma), Roberto recalled his informal multisport background and the early steps that eventually led him, years later, into the world of Ironman.
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Multisport childhood, surfing, and first contact with Luiz Gandolfo
During his childhood and youth, Roberto never took part in official competitions. His family enjoyed recreational sports during vacations and on weekends—beach soccer, tennis, volleyball, and surfing. His biggest role model was his older brother, four and a half years his senior, who dedicated himself to running and rowing training. Roberto also took up rowing in a training boat and learned all four swimming strokes at his mother's insistence, but his true connection with the water came from his frequent surfing habit.
His introduction to structured training came in 1994 when he started college as a Business Administration major. Invited by his friend Rodrigo Furnaro, he began attending swimming and running workouts with coach Luiz Gandolfo. At the time, Roberto did not own a bike and never even considered competing: he refused to wake up at dawn to ride because he preferred going out at night, using the workouts simply to stay in shape. That routine lasted until around 2006, when professional career changes kept him away from training for a decade.
Debut in the three disciplines and the turning point toward endurance
Cycling finally became a permanent part of his routine in 2016, encouraged by his brother-in-law. With only one month of riding experience and using a standard road bike, Roberto agreed to enter his first short-course triathlon in Pirassununga. He swam and ran reasonably well relying on muscle memory, but felt the harsh physical toll of the bike leg.
After a break in 2017, his brother-in-law insisted once again, and both signed up for the Ironman 70.3 in Patagonia in 2018. The experience ignited his desire to train consistently. The following year, in 2019, Roberto lined up at Ironman 70.3 Florianópolis, qualified for the 70.3 World Championship in Nice, and was hooked on long-distance racing for good.
Saying goodbye to amateur soccer and embracing a competitive mindset
Until 2019, Roberto still tried to juggle triathlon with amateur soccer tournaments at his sports club. Although his aerobic conditioning allowed him to run for the entire match while teammates grew exhausted, the sudden changes of direction, jumps, and tackles took a heavy toll on muscle recovery. Recognizing the constant risk of injury, he walked away from the pitch for good to focus on linear endurance training.
Without a formal technical background built in his youth, Fonseca credits his progress to sheer work capacity and discipline. A huge admirer of the fierce competitive spirit of athletes like Ayrton Senna, Gustavo Kuerten, Rafael Nadal, and Canadian triathlete Lionel Sanders, he sought to apply that same daily consistency to achieve standout results in the sport.
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