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The evolution of marathon running
Long before live runner tracking, wearable technology, and real-time performance analytics became part of marathon culture, race day relied heavily on instinct, timing, and luck.
Paula Radcliffe remembers watching her father run the London Marathon in the 1980s, pacing himself off a standard Casio Timex stopwatch while spectators had no way of knowing exactly where runners were on the course.
“To see him, we had to hope that his predictions were on point in terms of just predicting where he would be at a certain point,” she recalls. “It was really kind of stab in the dark.”
Today, marathon running has evolved from those early experiences. Spectators can track runners in real time, athletes can monitor sleep and recovery, and organisers can manage hundreds of thousands of participants through intelligent systems operating behind the scenes.
“The improvements in technology are huge,” says Radcliffe. “Across the board in terms of fuelling, hydration, shoes, and the technology around the race itself.”
Shifting to predictive performance
When Radcliffe first began training seriously, performance improvement was measured through repetition and feel rather than real-time metrics.
She ran the same routes repeatedly to track progress and relied on simple observations to monitor recovery.
“To measure improvements, you just ran the same course, and you got quicker,” she says. “My sleep data was looking at the clock when I went to sleep and when I woke up and taking my morning pulse.”
Today’s runners have access to a completely different level of insight. Wearable technology, gait analysis, physiological monitoring, and AI-powered performance tools can help athletes better understand how their bodies respond to training, recovery, nutrition, and race-day conditions.
This shift towards personalised performance support is central to TCS’ vision for the future marathon. Smart health twin patches and connected sensors could one day stream physiological data into personalised digital twins. While this technology can help medical teams identify early warning signs, Radcliffe points out its power as a predictive coaching tool to eliminate training guesswork.
“I think being able to tailor training individually is a huge plus for future generations,” she says. “To be able to go straight to what works for them, then put the work in, then get results faster.”
For Radcliffe, technology is not replacing hard work but helping athletes make more informed decisions about how they train, race, and recover safely.
Where data meets instinct
Despite the rapid rise of data-driven training, Radcliffe believes one of the most important skills for runners remains the ability to listen to their own bodies.
“In some respects, when we talk about the pros and cons of technology, I learned to be a lot more aware of my body than people who use all of the input today,” she explains.
While technology can reduce guesswork and improve preparation, Radcliffe believes intuition still plays a vital role in endurance sport.
“I do encourage people to embrace the technology – use it,” she says. “But at the same time, sometimes just tune in to your own body and what it’s doing and those feelings because you kind of have to train that as well.”
She also believes technology should strengthen resilience rather than create dependence. “If the data goes down, you need a backup plan,” she says. “You can’t get it all from data.”
And that data shouldn't just override instinct; it can supercharge the psychological game. Radcliffe recalls a pivotal moment early in her career – when physiological data proved she was in peak shape right before a major race – acknowledging the impact: "I knew I was in good shape anyway, but seeing it written down really gave me a huge, huge confidence boost."
A connected marathon experience
Technology is now transforming far more than athletic performance.
Modern marathons have become highly connected environments that improve experiences for runners, spectators, broadcasters and organisers alike.
“If you actually look at the amount of technological work that goes into planning the day, it’s huge,” says Radcliffe. “I don’t think we’d be able to see as many people coming through the marathon as we are doing without those improvements in technology.”
AI-enabled systems could allow organisers to simulate race-day scenarios before an event begins, helping identify congestion points, optimise participant flow, and improve operational planning. Smart corrals using pacing data, biometric insights, and crowd density analysis could further help reduce congestion and mismatched pacing groups, creating safer and fairer starts for runners.
For those watching, live tracking has transformed race-day engagement.
“You can type in anybody’s race number and track how they’re doing,” Radcliffe explains. “You can see when they’ve actually crossed the start line and exactly where they are on the route.”
Emerging technologies such as augmented reality glasses could push the spectator experience even further by allowing viewers to access live information while remaining immersed in the atmosphere around them.
"That’s the big advantage," Radcliffe explains. "You can get the data without having to look down at a phone and looking away from the action."
Making marathons more sustainable
As marathons continue to scale globally, sustainability is becoming an increasingly important part of race-day innovation.
From reducing waste to improving hydration systems and optimising event operations, technology is helping organisers rethink how major races impact cities and communities.
“Anybody doing any kind of outdoor sport, but particularly runners, we spend a lot of time outdoors, and you really gain an appreciation for the outdoors and the planet,” says Radcliffe.
The shift in event sustainability is generational. Radcliffe shares that at a recent race, her son was puzzled to see an older runner wearing a plastic trash bag at the start line. "I said, 'That's actually what people used to do to stay warm because you've got to throw the kit away!'," she recalls.
Today, technology-driven logistics allow organisers to collect, sort, and donate discarded warm-up gear smoothly, replacing the literal waste of the past with circular ecosystems.
TCS’ vision for the future marathon includes innovations designed to reduce waste and improve operational sustainability across the race ecosystem. Hydration pods could help reduce reliance on single-use cups and bottles, while AI-powered autonomous robots could support real-time waste sorting across compostables, recyclables, and landfill materials.
Radcliffe has already seen meaningful progress in race-day sustainability improvements. “The new advancements in water capsules mean there’s a lot less waste and a better experience for the runner,” she says. “They’re probably getting better hydration.”
Human-centred: the future of running
While the technology shaping marathon running continues to evolve rapidly, Radcliffe believes the defining qualities of the sport remain unchanged.
“I think discipline and motivation are key for the marathon runner,” she says. “Most of all, you have to enjoy what you’re doing. You have to enjoy that process.”
Technology is helping create safer, more connected, and more inclusive experiences for runners, organisers, and spectators alike. But for Radcliffe, the future of running will remain deeply human.
“The more these kinds of technologies help [with flexibility],” she says, “the greater the opportunity for people to get the most out of their training sessions and the entire marathon experience.”