
Today’s NASCAR drivers often train like endurance athletes to endure the cockpit’s intense heat and the extreme G-forces produced by stock cars. Among those who raised awareness about the crucial role of physical fitness in racing is Jimmie Johnson, the seven-time champion known for pioneering a focus on peak fitness in modern NASCAR.
Johnson recently shared his fitness journey in an interview on The RACER magazine’s YouTube channel, explaining how he evolved from a standard gym enthusiast into a dedicated triathlete. This transition highlighted his commitment to enhancing performance both on and off the track.
From Gym Workouts to Racing Efficiency
Initially, Johnson shaped his physical fitness through intense weightlifting sessions, which helped him adopt a more disciplined lifestyle. The sense of accountability he developed influenced every aspect of his routine. Reflecting on this period, he said,
“I just made better decisions during the week. From what I was eating, my rest, I was up earlier, I was more efficient during the day, got deeper into my notes, deeper into engineering and all these different elements.”
—Jimmie Johnson
However, Johnson eventually found the repetitive gym routine uninspiring, pushing him to explore other forms of physical challenge.
Discovering Triathlons and Renewed Motivation
Johnson’s background in mountain biking and swimming from his school days made triathlons a natural fit. Embracing this demanding sport reignited his passion for competitive training. He encouraged members of his race team and fellow driver Kasey Kahne to participate in triathlon events with him.

Johnson recounted their experience:
“We raced a July race in Daytona, and then the next morning did a sprint-distance triathlon in Charleston, South Carolina, and I was just hooked, man. It was like another form of racing.”
He added,
“I started building some structured training around it and I found again that the accountability, the nutrition, the hydration, the meditative nature of following a line in the bottom of the pool and swimming to being on my rides, to running. I got my day organized and all I would think about was the race car and what I needed to do there.”
—Jimmie Johnson
Reaching Peak Performance and Setting New Standards
Johnson reached impressive athletic milestones during his career, including running as many as 100 miles per week while preparing for the 2018 Boston Marathon. His rigorous approach sets a high bar for aspiring NASCAR drivers who aim to emulate his success but may underestimate the physical dedication required.
By incorporating triathlon training, Johnson not only enhanced his physical endurance but also improved his mental focus and daily discipline, elements crucial for excelling in the demanding Cup Series. His fitness evolution demonstrates how endurance sports can transform a driver’s preparation and performance.
The Lasting Influence on NASCAR and Future Prospects
Jimmie Johnson’s fitness transformation signifies a shift in how professional drivers view physical training, highlighting the necessity of holistic preparation for modern motorsports. His journey signals a growing trend in NASCAR, where endurance and cross-training are becoming essential for sustaining peak competitive form.
As more drivers adopt similar fitness philosophies, the sport is likely to see elevated standards of physical and mental readiness, shaping the future of racing performance.