Valtteri Bottas has never been one to shy away from a challenge, but the popular Finnish driver recently revealed just how far he was willing to go in the early days of his Formula 1 career. In a heartfelt letter published online, the 36-year-old opened up about the extreme measures he took to shed weight for his team—measures that included starving himself during his time at Williams.

Now back on the grid for his 13th F1 season, Bottas joins Cadillac, the sport's newest team, after a year away. It's a fresh chapter for a driver who has seen it all: from his breakout years at Williams starting in 2013, to a dominant stint alongside Lewis Hamilton at Mercedes from 2017, and finally three seasons with Alfa Romeo/Sauber from 2022 to 2024. But before the podiums and the glory, there was a darker side to his pursuit of speed.

In his letter for The Players' Tribune, Bottas recalled the pressure he felt heading into the 2014 season. "OK, now the silly Finnish guy has to get a little bit serious," he wrote. "I won't bore you, don't worry. I am not going to cry here. We don't have to play the dramatic music. But yeah… basically, I started starving myself."

It all began with a simple request from the Williams team. They predicted an overweight car for 2014 and suggested Bottas lose five kilograms. At the time, there was no combined seat-plus-driver weight minimum, so every kilo counted. "If you put a clear goal like that in front of me, I am going to obsess over it," he explained. "When you tell me five kilos in two months, my brain thinks, 'Five? Why not 10? We can make the car even quicker.'"

What followed was a grueling routine of steamed broccoli and cauliflower for almost every meal—a diet so stark that Bottas can still recall the smell. "Wet. Green. Plain. My god," he wrote. He turned weight loss into a game, waking up each morning to step on the scale and feeling a "deep satisfaction" as the numbers dropped. He would run for 90 minutes, then fuel up on a tiny bowl of vegetables, only to run another 90 minutes. His coach tracked everything—his training, his heart rate—but even then, Bottas pushed himself to the limit.

For fans of the sport, this glimpse behind the visor is a stark reminder of the sacrifices drivers make. Bottas's story isn't just about speed—it's about the relentless pursuit of perfection, even when it comes at a personal cost. As he gears up for a new season with Cadillac, his resilience serves as inspiration for athletes and enthusiasts alike: every champion's journey has its hidden struggles.