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When kids run, they don’t track their heart rates or pay attention to their paces. They just zoom along however fast as they like, and they often laugh while they do it. That kind of joy in running can be rare to capture as an adult. But there’s one workout that brings a bit of that fun back: the Fartlek.

Sure, the term may sound a little silly. For that, you can blame the Swedes—Fartlek translates as “speed play” or “speed game” in Swedish. “I like to remind my athletes that [Fartleks are] just basically playing with speed in a way that feels good to them on the day,” says USATF-, RRCA-, and UESCA-certified running coach Amie Dworecki, CPT. “It does involve some faster running, but running in a way that's fun.”

If this sounds like something your training plan could use more of, here’s what you need to know about Fartlek training, why it could benefit your running, and how to get the most out of this workout.

What is a Fartlek?

The premise of Fartlek training is fairly simple. “It's basically short bursts of speed when you're running mixed in with your regular running pace,” says USATF- and RRCA-certified running coach Marnie Kunz, CPT. Those bursts can be as random as sprinting to the next stop sign every time you see a red car. Or you can have more structured sets of one minute quicker, then three minutes easier, for example. Either way, it’s continuous running, so you return to your relaxed, conversational base pace after each burst of speed.

The idea behind the workout came from Swedish national cross-country coach Gösta Holmér in the 1930s. He wanted to make his struggling team more competitive by combining speed work with endurance training. It worked: His runners began breaking records in multiple events—and the rest of the world began taking notice. Now, Fartleks are a staple part of many running programs.

The difference between intervals and Fartlek training

Both Fartlek and interval workouts are forms of speed training where you push the pace for a while, then let your body recover somewhat before pushing again. But while intervals are precisely measured, and often done on a track, Fartleks are more informal. You can do them anywhere, and the bursts of speed may vary in distance or intensity based on how you’re feeling.

Also, even when you pick up the pace, you aren’t pushing so hard that you need to stop running after a faster burst, says Dworecki. “You don't want to hit that 10 out of 10 to where you feel like you have to walk afterward.” While after an interval, you may take a break to huff and puff on the side of the track with your hands on your knees, the point of a Fartlek is to keep running the whole time to build your endurance while also working on your speed.

These workouts end up being slightly easier on the body because you aren’t pushing quite as hard as you may during intervals. That’s why Dworecki often recommends Fartleks to runners as a precursor to interval training. “It introduces your body into speed work,” she says. That can be helpful both for beginners who are newer to running, or runners who are in the earlier stages of a training cycle.

How Fartleks can improve your running

Fartleks have several benefits if you work them into your training strategically.

1. They can help protect your body against injury

Because Fartleks can be used as a way to ease into speed work, Dworecki says they can help to keep your body healthy. “It helps you prevent injuries that might come up if you just jumped into interval training,” she says. For the same reason, she often gives her athletes Fartleks during the week after they’ve had an especially difficult long run when she’s afraid they may not be recovered enough to do harder intervals or tempo runs.

2. They can make you faster

Fartleks are a great way to improve your VO2 max (the gold standard for measuring cardio fitness) and increase your lactate threshold (the point at which lactate accumulates faster than your body can handle, leading to fatigue), according to the National Strength and Conditioning Association. One small 2020 study found that regular Fartlek training can also significantly improve muscular endurance1.

What makes Fartleks unique is that they keep your heart rate high, rather than letting it come all the way down between intervals. This trains your body (and mind) to push hard even as you get tired. “Your body adapts to running faster even when you're fatigued because you're running throughout the workout—you don't get a full recovery,” says Kunz. This can be especially helpful practice for races, where you may want to speed up for a bit to pass other runners, and then still keep running to the finish line.

3. They can help you improve your running form

Spending some time running faster can make you run more efficiently. “You’re improving your biomechanics,” says Kunz. For example, to speed up, most of us naturally pick up our knees more, lean forward, and increase our cadence. All of these add up to a better running form.

4. They can help you rediscover the fun of running

Intervals typically feel like hard work. But a Fartlek can make running feel more like play. “This is a workout that really should leave you feeling good and invigorated,” says Dworecki. And for runners who normally only do steady-paced runs, a Fartlek can switch things up in an unintimidating way.

How do I start Fartlek training?

For beginners, both coaches recommend starting with Fartleks by adding three or so faster segments into your regular run. Each burst should be about 100 meters or a minute long. Then give yourself three to five minutes to recover in between. Don’t worry if that feels too easy. “If you feel like you can do more, then the next time do a little bit more. But it's always better to feel good at the end of your workout rather than risking injury,” Dworecki says.

Advanced runners can work about eight or so faster segments into a Fartlek run. Dworecki suggests keeping each between one and two minutes and doing them at whatever pace feels good to you, with one minute of recovery in between.

No matter your level, remember the basics: Make sure to start with a solid warmup of pre-run dynamic stretches then at least 10 minutes or one mile of easy running, says Kunz. After the speedy stuff is done, finish off with another 10-minute cooldown of easy running.

How to make the most out of Fartlek training

Even though Fartleks are a more casual approach to speed training, they still take a toll on your body. Use them conservatively, warns Dworecki. “It's not a workout you want to do every day because you can overdo it,” she says. Any kind of speed work—whether that’s Fartleks, intervals, or tempo runs—should only be done about once a week, or twice at most if you’re a more experienced runner.

And remember: Don’t take your Fartleks too seriously. These workouts should add a sprinkle of playfulness to your running routine. “You don't want to go too strict on it,” says Dworecki. Instead, just have some fun seeing how fast you can go.

Long before he became the fastest man in history, before the Olympic gold medals, world records, and global superstardom, Usain Bolt was simply a gifted teenager with extraordinary speed and limitless potential. In 2002, on the track at Kingston's National Stadium in Jamaica, the world witnessed the first chapter of a story that would forever change athletics.

At just 15 years old, Bolt lined up for the men's 200 metres at the World Junior Championships with the weight of expectation resting on young shoulders. Competing before a passionate home crowd, the Jamaican prodigy produced a performance that instantly captivated the athletics world. Crossing the finish line in 20.61 seconds, he became the youngest athlete ever to win the men's 200m title at the championships.

It was far more than a gold medal. It was the moment the world realised that a once-in-a-generation talent had arrived.

Bolt's victory in Kingston marked the beginning of one of the greatest careers in sporting history. Over the years that followed, he rewrote the record books, dominated the Olympic Games and World Championships, and transformed sprinting into a global spectacle through his breathtaking speed, infectious personality, and unrivalled confidence. His legacy continues to inspire young athletes across the globe, many of whom dream of following the same path he once began as a teenager.

This week, that dream comes alive once again as the World Athletics U20 Championships take centre stage at the iconic Hayward Field in Eugene, Oregon. The venue has already witnessed the birth of future superstars. In 2014, it was where Britain's Dina Asher-Smith and Uganda's Joshua Cheptegei captured their first global titles, launching careers that would later produce world championships, Olympic medals, and lasting legacies in athletics.

Twelve years later, another generation arrives in Eugene hoping to create its own defining moment.

Among the brightest young talents is Great Britain's Jake Odey-Jordan, the 200m bronze medallist from Lima who now owns the European U20 100m record after an astonishing 10.01-second performance. He enters the championships eager to build on his growing reputation as one of Europe's most exciting young sprinters.

The United States will look to Tate Taylor, who has already made history as the first American high school athlete to break the 20-second barrier for the 200 metres. Fresh from a Diamond League victory in a sensational 19.75 seconds, he arrives in Eugene carrying the momentum of one of the most remarkable junior seasons ever recorded.

Jamaica, the nation that introduced the world to Usain Bolt, will once again have high hopes through Shanoya Douglas. The talented sprinter has established herself as one of the championship's leading contenders after producing lifetime bests of 10.98 seconds for the 100m and 22.11 for the 200m this season.

History has repeatedly shown that the World U20 Championships are far more than a junior competition. They are often the first chapter in the careers of future Olympic champions, world record holders, and global icons. Every generation arrives with ambitious dreams, but only a select few leave having announced themselves to the world.

No one can say with certainty whether the next Usain Bolt will emerge this week. Greatness cannot be predicted, and legends are never manufactured. Yet every legendary career begins with a single breakthrough performance.

For Bolt, that defining moment came in Kingston in 2002.

Now, under the famous lights of Hayward Field, another group of gifted teenagers stands ready to chase history. Somewhere among them could be the next athlete whose name will inspire the world for years to come.

"An athlete cannot run with money in his pockets. He must run with hope in his heart and dreams in his head." More than seventy years after those words were spoken, they remain among the most powerful messages ever shared in distance running. They are often quoted as simple motivation, but behind them lies a remarkable story of sacrifice, courage, conviction, and an unwavering belief that true greatness is never measured by financial reward.

Few athletes have left a legacy as enduring as Emil Zátopek. Known around the world as "The Czech Locomotive" for his relentless determination and unmistakable running style, he redefined what was possible in endurance racing. His legendary performance at the 1952 Olympic Games in Helsinki still ranks among the greatest achievements in athletics history. In the space of just nine days, he captured Olympic gold in the 5,000 meters, the 10,000 meters, and, incredibly, the marathon—a race he had never attempted before.

Yet the world in which Zátopek competed was vastly different from today's professional athletics landscape. During the 1950s, elite sport officially operated under strict amateur rules. Olympic athletes were forbidden from accepting prize money or earning a living directly from competition, although unofficial financial arrangements existed in many sports. Zátopek himself never raced for appearance fees or lucrative prize purses. Instead, he served as an officer in the Czechoslovak People's Army, receiving a military salary while representing his country. Running brought him glory, but not personal wealth.

It was within that environment that his famous words carried genuine meaning. For Zátopek, success was never driven by the promise of money. He believed the greatest performances were fueled by hope, ambition, discipline, and the courage to pursue dreams that seemed impossible. Those qualities, rather than financial incentives, formed the foundation of lasting excellence.

With the benefit of history, his words carry even greater significance. In 1968, during the Prague Spring, Zátopek openly supported democratic reforms in Czechoslovakia. When the movement was crushed, he paid a heavy personal price for standing by his principles. He was stripped of his military rank, removed from public life, and forced into years of manual labor. The man who had once stood proudly atop the Olympic podium found himself performing physically demanding jobs, far removed from the stadiums where he had inspired millions.

His story reminds us that the values he expressed were not empty words crafted for public admiration. He lived by them, even when doing so came at enormous personal cost. His belief that hope and conviction mattered more than material rewards became evident not only in the races he won, but also in the hardships he endured with remarkable dignity.

Distance running has changed dramatically since Zátopek's era. Today's elite athletes compete in a fully professional sport where prize money, sponsorship contracts, appearance fees, and endorsement deals can be worth millions. Success on the track and roads now offers opportunities that were unimaginable during the age of amateur competition. Professionalism has transformed the sport, allowing athletes to train full-time, access world-class coaching and sports science, and build financially secure careers.

Yet despite these changes, the essence of Zátopek's message has never lost its relevance.

Every elite runner naturally hopes to earn a good living from years of dedication and sacrifice. There is nothing wrong with financial success, and the rewards available today have elevated the standard of competition across the world. But history consistently shows that money alone is rarely enough to sustain greatness. The athletes whose careers endure the longest are often those driven by an inner passion to improve, to test their limits, and to chase excellence for its own sake. Financial rewards become the result of that commitment, not the reason for it.

When competition is motivated solely by wealth, its deeper purpose can fade. But when an athlete races with genuine belief, relentless determination, and an unwavering dream, extraordinary performances often follow naturally.

That is why Emil Zátopek's words continue to resonate across generations. His legacy extends far beyond Olympic medals and world records. It lives in every runner who laces up their shoes with a goal that cannot be measured in dollars, every athlete who refuses to surrender when the race becomes painful, and every competitor who understands that the greatest victories begin long before the finish line.

The economics of distance running may have evolved beyond recognition, but the heart of the sport remains unchanged. Every athlete still arrives at the starting line carrying something far more valuable than money—hope in their heart and dreams in their head. Those invisible qualities have always been, and will always remain, the true fuel of greatness.

Winning a major championship is never just about crossing the finish line first. Behind every gold medal lies a carefully crafted race plan, and Josh Kerr's unforgettable Commonwealth Games triumph in Glasgow was a perfect example of tactical brilliance meeting extraordinary finishing speed.

While the final time of 3:54.12 for the mile will be remembered as the official result, the split times reveal a much deeper story—one of patience, precision, and devastating acceleration when it mattered most.

Kerr resisted any temptation to force the pace from the gun. Instead, he settled into a controlled rhythm, allowing the opening stages to unfold naturally. His first four 100-metre segments—14.9, 15.1, 15.3 and 15.1 seconds—brought him through 400 metres in 60.4 seconds, a measured opening that conserved valuable energy while keeping him firmly in contention.

The second lap remained equally composed. Passing 500 metres in 15.3 seconds before recording splits of 15.7, 16.2 and 15.4, Kerr reached 800 metres in 2:03.0. The pace had eased, but that was exactly where the Scottish star wanted to be. Rather than chasing early speed, he was setting the stage for a decisive finish.

Everything changed after halfway.

Kerr gradually increased the tempo with smooth, controlled acceleration. His 900-metre and 1,000-metre splits of 15.2 and 14.9 seconds signalled that the race was beginning to stretch. He then surged through 1,100 metres in 14.3 seconds before covering the next 100 metres in just 13.4 seconds to reach 1,200 metres in 3:00.8.

From there, the home crowd witnessed championship running at its finest.

Instead of fading, Kerr became even stronger. He reeled off three consecutive 100-metre splits of 13.4, 13.4 and 12.8 seconds, dismantling the field with every stride. His final 100 metres were covered in a stunning 12.5 seconds, sealing an emphatic victory and sending the Glasgow crowd into celebration.

The progression of his race was remarkable. After opening with relaxed 15-second splits, Kerr transformed the closing stages into a demonstration of world-class speed endurance. His ability to accelerate continuously over the final 600 metres highlighted not only exceptional fitness but also supreme confidence in his race plan.

Championship middle-distance racing is rarely about producing the fastest possible time from the start. More often, it rewards athletes who understand when to conserve energy and when to unleash everything they have left. Kerr executed that philosophy to perfection.

His split chart paints the picture of a runner who never panicked, never wasted effort, and saved his greatest weapon for the closing stages. It was a textbook display of patience followed by relentless aggression—a combination that turned a tactical race into a memorable Commonwealth gold medal performance.

For aspiring middle-distance runners, Kerr's Glasgow masterpiece offers an important lesson: the strongest finish often belongs not to the athlete who runs hardest from the gun, but to the one who knows exactly when to make their move. On home soil, Josh Kerr timed that move to perfection, producing a performance that will stand as one of the defining moments of the championships.

At just nine years old, Oliver Smith has achieved something extraordinary—not by chasing records or medals, but by proving that determination, compassion, and consistency can create a life-changing impact.

Hailing from Wombwell, on the outskirts of Barnsley, Oliver set himself a remarkable challenge at the beginning of the year. Rather than attempting a single marathon, he decided to complete the equivalent distance of nine marathons over several months. From January 1 to April 26, the young runner covered an incredible 380 kilometres, breaking the distance into manageable daily runs suitable for a child his age.

His routine was built on dedication. Saturdays were reserved for parkrun events, Sundays for junior parkrun, while the remaining kilometres were steadily accumulated throughout the week. Averaging approximately 3.3 kilometres each day, Oliver never lost sight of the goal that inspired every step.

The challenge carried deep personal meaning. Last summer, Oliver's father, Tom Smith, suffered a devastating health setback after losing most of the vision in one eye. Medical examinations revealed a 4-centimetre meningioma wrapped around his optic nerve, leading to a complex 12-hour operation at the Royal Hallamshire Hospital in Sheffield.

Throughout the family's difficult journey, The Brain Tumour Charity provided invaluable guidance, support, and reassurance. Grateful for the help his family received, Oliver decided he wanted to give back in the most meaningful way he could. He launched a fundraising campaign with an initial goal of raising £2,000 to support others facing similar challenges.

What followed exceeded everyone's expectations.

Oliver brought his incredible fundraising challenge to a memorable conclusion at the Mini London Marathon, finishing on the very same day his mother, Hannah Smith, completed her first-ever London Marathon. It was a fitting family celebration of courage, resilience, and perseverance.

By the time Oliver crossed the finish line, donations had soared beyond £16,500—more than eight times his original target. His remarkable achievement captured the hearts of supporters, demonstrating how one young boy's determination could unite an entire community behind an important cause.

For Oliver, however, the journey is far from over. Inspired by the overwhelming support and the difference his efforts have made, he has already begun working toward his next fundraising challenge.

His story serves as a powerful reminder that age is no barrier to making a meaningful difference. Sometimes, the greatest acts of courage are measured not by speed or distance, but by the willingness to take one small step after another for the benefit of others.

Oliver Smith's inspiring journey is more than a fundraising success—it is a testament to the strength of family, the power of kindness, and the extraordinary impact that can begin with the simplest decision to help.

Sometimes the smallest opportunity creates the greatest triumph, and Jamaica's Navasky Anderson proved exactly that with a stunning performance to capture the men's 800m title at the 2026 Commonwealth Games in Glasgow.

Less than 24 hours after scraping into the final by the slimmest of margins, Anderson produced the race of his life, surging to victory in 1:45.33 to complete one of the most remarkable comeback stories of the championships. His gold medal was not only a reward for exceptional talent but also for courage, determination, and unwavering belief when everything was on the line.

The journey to the top nearly ended in the semifinals. Locked in an intense battle with England's Max Burgin for the final qualification place, Anderson threw himself across the finish line in a dramatic dive, stopping the clock at 1:45.38. That desperate effort earned him the last available place in the final as the fastest non-automatic qualifier, keeping his Commonwealth dream alive by the narrowest of margins.

With another chance in his hands, the Jamaican made sure it counted.

In a fiercely contested final, Anderson displayed outstanding tactical awareness and patience throughout the opening stages before unleashing a devastating finishing kick down the home straight. His perfectly timed acceleration left the rest of the field with no answer as he crossed the finish line first, securing a memorable Commonwealth crown and one of Jamaica's standout victories of the Games.

Australia's Luke Boyes delivered an impressive performance to claim the silver medal in 1:45.93, while Kenya's Wyclife Kinyamal battled strongly to take bronze in 1:46.12 after another highly competitive championship race.

Anderson's unforgettable triumph will be remembered as one of the defining moments of Glasgow 2026—a powerful reminder that championships are not always won by the fastest qualifier, but often by the athlete who refuses to surrender. From a fearless dive that kept his hopes alive to a brilliant gold-medal performance less than a day later, the Jamaican wrote one of the most inspiring chapters of these Commonwealth Games.

Men's 800m Final Results

1. Navasky Anderson (Jamaica) — 1:45.33

2. Luke Boyes (Australia) — 1:45.93

3. Wyclife Kinyamal (Kenya) — 1:46.12

Navasky Anderson arrived in the final as the last man to qualify, but he left Glasgow as the Commonwealth champion—a remarkable transformation that perfectly captures the unpredictable beauty of championship athletics.