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When approached realistically, running can be an excellent tool for weight loss and weight management, but don’t be fooled by the numerous myths surrounding them

People often start running to drop a few pounds. Hopefully, they fall in love with it, move beyond the number on the scale and continue running for its many other benefits; but for many people, it’s impossible to decouple running from the weight-loss goal. When done correctly, running can help people struggling with excess weight to shed pounds—and continuing to run can be effective way to keep them off. But the subject of running and weight loss is fraught with mythology. We delve into some of the problems with the weight-loss approach to running, including what actually works, what definitely doesn’t and how to keep running as part of your life, regardless of whether you lose weight.

Myth

You can run a marathon PB while dropping 10 pounds

You can do anything, but you can’t do everything. As a rule, you won’t boost performance at the same time that you’re purposely losing weight. Often, the opposite is true, says Kylee Van Horn, RD, owner of Flynutrition in Boulder, Colo. When you’re restricting your food intake, you’re unlikely to make performance gains, but unfortunately, we often equate being faster with being thinner.

“The first thing I tell a client with a weight-loss goal is that losing weight will not necessarily make you a faster runner,” adds Carla Rodriguez Dimitrescu, PhD, an Edmonton-based expert in nutrition and metabolism who works primarily as a running coach. It’s fine if weight loss is your goal—but don’t confuse it with performance, because the way that you’ll get faster isn’t necessarily the way that you’ll drop a pound a week (which should be the maximum weight you’re losing per week, unless advised otherwise by your doctor).

Myth

There is one “runner’s body”

Let’s be clear: there is no single body type that signifies “runner.” Often, people with weight-loss goals who run have a vision in their minds of the long, lanky phenotype often associated with marathoners. But runners come in all shapes and sizes—and if you run, you have a runner’s body, period.

Even in the professional sphere, there are different body types that excel at different types of running. “You would never tell a professional runner that he doesn’t look like an astrophysicist,” says Dimitrescu. “But for some reason, that astrophysicist is upset that he doesn’t look like a runner.” She adds that people have different somatotypes, which means that genetics and environment will both play a role in how running (or dieting, or strength training) changes your body. And if you really want to see how every body is a runner’s body, sign up for a local 5K race and look around you at the start.

Still, the “runner’s body” myth runs deep, and it can be hard to break free of the desire to be ultra-thin. That’s why Stevie Lyn Smith, RD, a board-certified sports dietitian based in Buffalo, N.Y., tries to focus her clients on health outcomes as well as esthetic goals. “We try to look at other goals, like running your personal best in a race,” she says. “Maybe you won’t achieve whatever physique is jammed in your mind as the ‘ideal,’ but you’re able to appreciate these non-body-focused victories.”

Myth

Lighter is healthier/faster

Here’s an oversimplified example: say you’ve had the stomach flu for a week. You’ve lost seven pounds during that time, thanks to days spent in agony. You head out for your first run since you got sick. How does it go? That’s right—dropping weight doesn’t always lead to speedy running, and while that’s an extreme example, it’s not much different from how you’d perform after a week of crash dieting.

“Slimmer is not necessarily better,” says Dimitrescu. “And too much weight loss or restriction can lead to issues like stress fractures, increased rates of illness and injury and chronic fatigue. That’s not going to make you healthier or faster.”

And unfortunately, Don Henley was right when he sang, ‘You can’t go back, you can never go back.’ If, at 46, you’re mourning your running prowess or body composition from when you were 17, you may need to come to terms with the fact that your body isn’t the same, and no amount of training or restricting will get you there. You need to find your new healthy, speedy body, says Van Horn.

Myth

Runners can lose weight faster by eliminating carbs

Skip any diet that eliminates entire macronutrient groups, says Dimitrescu. These fad diets come and go, and for someone who wants to be a healthy, optimized runner, they’re just not worth it. “I don’t like any restrictive diet that advocates for super low calories or eliminates a macronutrient,” she says.

“My priority is always that clients get plenty of protein—at least one gram per kilogram of body weight—and adequate carbohydrates. People have a fear of carbohydrates, but if you don’t eat enough carbs, you’re going to use the protein as your source of energy instead of using it to help build and repair muscle. You’re not doing any favours to your body if you don’t provide it with the energy it needs to do the work that you’re asking it to do.”

Myth

Running earns you calories

A common saying about running is that you run to eat. But really, you should be eating to run. “Don’t create a reward/punishment mentality around running and food,” says registered dietitian and runner Lindsey Elizabeth Cortes of San Antonio, Texas. “Try to focus on how you fuel and how you train as lifestyle choices and not things that need to be rewarded or punished.”

For example: it’s not, “I had a great run, so now I get to reward myself with nachos,” nor is it “I had a bad run, so now I can only eat a salad.” Instead, reframe to: “I ran, and now I’m craving nachos! Maybe I’ll have nachos with a salad.” Or, “I didn’t run, and I’m craving nachos. Maybe I’ll have nachos with a salad.”

Myth

Fasted running and intermittent fasting will speed up weight loss

Yes, fasted runs and intermittent fasting may potentially have some longevity and fitness-based benefits, but when it comes to weight loss, they’re not going to move the needle. In fact, they might be sabotaging your efforts. “For most people, things like fasted runs and intermittent fasting just equate to saving up their calories until the end of the day and then overdoing it in the evening, or using these so-called ‘healthy’ concepts to put a healthy spin on unhealthy, restrictive eating patterns,” says Van Horn. “But if you look into the research, there’s no benefit for doing fasted training for weight loss. In fact, we know that fasted running can raise cortisol levels, which can make weight loss harder.”

Intermittent fasting that takes place around your running window means that your runs aren’t being fuelled—which can both decrease your running performance and make it harder to lose weight, since you’re more likely to over-indulge later in the day. “At minimum, fuel around your workouts and during your training, so that you have enough calories on board to develop some adaptations and buffer the stress of the workout,” says Van Horn. She adds that if weight loss is the goal, you can reduce calories at meals that aren’t near your workout window. Calories should come out of meals that aren’t right before or after your runs. Lowering your portion of rice with dinner or cutting out dessert if you trained in the morning will give you greater results than skipping your post-run snack. (But keep your caloric deficit at a maximum of 500 calories per day.)

Things like fasting and fat adaptation (training your body to optimize fat over glycogen for fuel) may sound like they’re about weight loss, but the reality is that neither is likely to help you lose weight. Some research has found that when done under the right conditions, they might increase certain health markers or improve longevity, but they’re not the weight-shedding tools you may think they are.

Myth

The more you run, the more weight you lose

The natural inclination of someone who wants to lose weight by running is to run longer. Usually, the idea of training for a marathon or half-marathon gets floated around. But running shorter routes, with some harder efforts thrown in, will lead to better weight loss outcomes, because you’re able to get the benefits of the run cardio without as much stress on the body. And because the more you run, the more you need to fuel, chasing higher mileage is actually a bit of a fool’s errand, where weight loss is concerned.

“Endurance sport is not a weight management tool,” says Smith. “Volume-wise, if you’re running more than 10 hours a week while also working a normal job, spending time with family, dealing with all of those normal responsibilities, the long-term stress of that is not going to be conducive to weight loss. With a more appropriate training load for your current lifestyle, it’s easier for you to manage stress, and you’ll see better results.”

Myth

The number on the scale is the only number that matters

Rather than focusing on your weight in pounds, look at different metrics. “I like a combination of measurements with a soft tape measure, how a certain item of clothing fits, and scale weight done once a month,” says Van Horn. While body composition-measuring tools like a DEXA scan are often considered the gold standard, they are expensive and often difficult to access, so rather than spending time and money on that, focus instead on simple measurements that are replicable.

Daily weigh-ins are also a mistake, says Van Horn. Our bodies fluctuate from day to day, so scale weight on a daily basis can be disheartening. Instead, shift to weekly or monthly and look for a general trend rather than placing any importance on half a pound.

Finally, it’s not all about your body weight or size. Dimitrescu recommends looking at fitness and health markers, such as your resting heart rate, blood glucose levels, and HDL and LDL cholesterol. Often, these markers will improve quickly once you adopt a running habit and focus on healthy eating, and can help you see that even if the number on the scale isn’t changing, your body is.

In fact, research has shown that a focus on getting into the habit of running regularly actually is more effective for long term weight loss than focusing on the number on the scale—so it may be worth shifting your focus to the number of times per week you’re physically active, or minutes spent moving.

Jamaica’s Oblique Seville delivered another sensational statement at the Silesia Wanda Diamond League, storming to victory in a breathtaking men’s 100 metres and setting a new meeting record of 9.83 seconds.

In one of the deepest and most extraordinary sprint races ever witnessed, Seville powered clear of a world-class field to take the win, with Kenneth Bednarek of the United States finishing second in 9.87 and fellow American Christian Coleman completing the podium in 9.93.

But Seville’s meeting-record victory was only one part of the remarkable story. For the first time in history, all nine athletes in a single men's 100m race broke the 10-second barrier, producing an unprecedented display of sprinting depth.

The historic race also marked only the second time that every athlete in a men's 100m final had broken 10 seconds, following the eight-man final at the Paris 2024 Olympic Games. In Silesia, however, the achievement went even further, with an entire nine-man field dipping below the iconic barrier.

Nigeria’s Kayinsola Ajayi produced another impressive performance to finish fourth in 9.94, while South Africa’s Gift Leotlela followed in fifth with 9.95. Canada’s Olympic champion Andre De Grasse clocked 9.96 in sixth, with South African star Akani Simbine recording the same time in seventh.

American Ronnie Baker added another sub-10-second performance with 9.97 for eighth place, while Cameroon’s Emmanuel Eseme ensured the historic sweep was complete by running 9.99 in ninth.

For Seville, the victory was another emphatic demonstration of his exceptional form and his ability to rise to the occasion against the strongest opposition. His 9.83 not only secured the Diamond League win but also lowered the Silesia meeting record, putting an exclamation mark on a performance of the highest quality.

Nine men went under 10 seconds. Seville went under 9.84. On an unforgettable day in Silesia, the Jamaican stood tallest in a race that pushed the boundaries of what men's sprinting has ever seen.

Ethiopia’s Fotyеn Tesfay Haylu delivered one of the most remarkable women’s half-marathon performances ever seen on American soil on Sunday, powering to a commanding victory at the 2026 Buenos Aires Half Marathon in Argentina in 1:03:57.

Running with exceptional confidence and strength, Tesfay took control of the race and produced a superb solo performance to rewrite the event record. Her breathtaking run also carried historic significance, as she became the first woman to break the 64-minute barrier for the half marathon in the Americas, producing what is being celebrated as the fastest women’s half-marathon performance ever recorded on the continent.

The Ethiopian star was in a class of her own, crossing the finish line more than a minute clear of Turkey’s Nevin Can, who finished second in 1:05:06. Another Turkish athlete, Selin Can, completed the podium in third place with 1:05:11, as the leading trio all produced strong performances on the fast streets of Buenos Aires.

Kenya also featured prominently in the top positions, with Irene Jepchumba Kimais taking fourth in 1:06:04, followed by Sheila Chepkirui in fifth with 1:06:13. Magaret Akidor Ngathike finished sixth in 1:06:46, while fellow Kenyan Deborah Samum claimed seventh place in 1:08:32.

Brazil’s Nubia de Oliveira Silva was eighth in 1:11:13, while Argentina’s Sofia Luna and Dahyana Juarez rounded out the top 10 with times of 1:11:21 and 1:11:28, respectively.

Top 10 Women – 2026 Buenos Aires Half Marathon

1. Fotyеn Tesfay Haylu (Ethiopia) – 1:03:57

2. Nevin Can (Turkey) – 1:05:06

3. Selin Can (Turkey) – 1:05:11

4. Irene Jepchumba Kimais (Kenya) – 1:06:04

5. Sheila Chepkirui (Kenya) – 1:06:13

6. Magaret Akidor Ngathike (Kenya) – 1:06:46

7. Deborah Samum (Kenya) – 1:08:32

8. Nubia de Oliveira Silva (Brazil) – 1:11:13

9. Sofia Luna (Argentina) – 1:11:21

10. Dahyana Juarez (Argentina) – 1:11:28

For Tesfay, it was far more than a race victory. Her 1:03:57 performance was a statement of extraordinary quality, combining speed, endurance and remarkable solo running to produce a landmark result in Buenos Aires. In a race that will be remembered for years to come, the Ethiopian did not simply win—she redefined what was thought possible for women’s half-marathon running in the Americas.

Ethiopia’s Yomif Kejelcha produced one of the most extraordinary performances in road racing history on the streets of Buenos Aires, Argentina, reclaiming the half marathon world record with a sensational 56:51 performance at the 2026 Buenos Aires Half Marathon.

The former world record-holder delivered a breathtaking exhibition of speed and endurance to take 29 seconds off the previous pending mark of 57:20, set by Uganda’s Jacob Kiplimo and takes a huge chunk from his own former official world record. Kejelcha's new performance is pending the standard ratification procedures, but if officially ratified, it will return the world record to the Ethiopian star and mark another remarkable chapter in the evolution of the event. 

Kejelcha's achievement is particularly significant because the 57-minute barrier had already been broken before. Jacob Kiplimo had previously run under 57 minutes, clocking 56:42 that was not ratified demonstrating that the once-unthinkable barrier was possible. Kejelcha, however, has become the second man to run under 57-minute barrier who now returns to the top of the all-time rankings with another historic performance in Buenos Aires.

The Ethiopian's race was remarkable not only for the final time but also for the way he built his performance. He covered the opening five kilometres in 13:44 before reaching 10km in 27:18. Rather than slowing, Kejelcha accelerated through the middle stages, passing 15km in 40:39 and 20km in 54:02 as he continued to push the limits of elite road racing.

By the time he reached the finish line, Kejelcha had completed the race at an extraordinary average pace of approximately 2:42 per kilometre, producing one of the most astonishing sustained efforts ever witnessed in distance running. His stunning run sent a powerful message to the athletics world and further strengthened his status as one of the most formidable distance runners of his generation.

Behind the record-breaking champion, Ethiopia completed a dominant clean sweep of the men's podium. Tadese Worku Gebresilase claimed second place in 59:18, while Bereket Nega Batebo secured third in 1:00:17, giving Ethiopia a memorable one-two-three finish in the Argentine capital.

Kenya’s Jonathan Kipkoech Kamosong finished fourth in 1:00:20, followed by compatriot Simon Maywa in fifth with 1:00:55. Argentina’s Ignacio Erario gave the home supporters plenty to celebrate with an impressive sixth-place finish in 1:00:57, breaking the one-hour barrier in front of an enthusiastic local crowd.

Dillon Kipyeko of Kenya finished seventh in 1:01:07, with Robert Kiprop Koech eighth in 1:02:01. Mexico’s Julio Ortiz Ponce took ninth place in 1:03:17, while Colombia’s Jimmy Gómez completed the top 10 in 1:03:34.

The Buenos Aires Half Marathon will now take its place in the history books as the scene of a truly extraordinary breakthrough. For Kejelcha, this was more than just another victory. It was a spectacular return to the top, reclaiming a world record he had previously held and once again rewriting the limits of the half marathon.

The 56:51 performance remains pending ratification, but Yomif Kejelcha's run has already delivered one of the defining moments in the history of road racing.

Kenya delivered another commanding display of distance-running excellence at the Antrim Coast Half Marathon, with Isaia Lasoi leading a memorable Kenyan clean sweep of the men's podium in a race packed with world-class performances.

Lasoi emerged victorious after a thrilling battle at the front, crossing the finish line in a superb 58:26 setting a new course record. His winning performance underlined his strength and speed over the half-marathon distance, but he was made to work all the way by fellow Kenyan Daniel Mateiko, who finished just three seconds behind in 58:29 after an electrifying duel for the title.

The contest between the two leaders produced one of the standout moments of the race, with both athletes pushing deep into elite territory as they fought for victory. In the end, Lasoi found just enough to secure the win, while Mateiko's narrow defeat highlighted the remarkable depth and quality of Kenya's leading distance runners.

Vincent Kipkorir completed the Kenyan sweep, taking third place in 1:00:38 to ensure that all three places on the podium belonged to Kenyan athletes. Samwel Chebolei added further Kenyan strength to the results, finishing fourth in 1:01:01, while Amos Langat was also among the leading finishers.

The international field featured several prominent names. Australia's Jimmy Whelan produced a strong run, while Ethiopia's Yismaw Dillu featured among the front group. American marathon star Galen Rupp also delivered a notable performance, clocking 1:01:29 in another competitive outing for the experienced distance runner. Former world-class track and road athlete Edward Cheserek was also among the top finishers.

Lasoi's 58:26 victory, however, was the defining performance of the day. Together with Mateiko and Kipkorir, he gave Kenya a perfect podium and another emphatic reminder of the country's extraordinary strength in elite road running.

The Antrim Coast Half Marathon once again provided a fast, competitive stage for some of the world's finest distance runners, but when the decisive moments arrived, it was Kenya that owned the podium.

One of the most iconic milestones in the history of ultramarathon running is drawing closer, with entries for the historic 100th edition of the Comrades Marathon set to open on Tuesday, 25 August 2026.

The Comrades Marathon Association has officially announced a detailed entry process for the 2027 race, which will unfold in three stages and give runners around the world the opportunity to secure their place in what promises to be one of the most significant editions ever held of The Ultimate Human Race.

The announcement followed the official launch of the 2027 Comrades Marathon on Wednesday, 19 August, when the centenary campaign, “The Greatest Story Ever Run,” was unveiled alongside a special logo created exclusively for the landmark 100th edition.

The launch also revealed several major highlights for the Centenary Race. The historic event will take place on Sunday, 13 June 2027, and will be a Down Run, with 28,000 places available. The entry process will include a ballot, while the race will offer a record R8.919 million in prize money. Organisers have also set an ambitious goal of raising R10 million for the Amabeadibeadi charities, adding an important charitable dimension to the centenary celebrations. One of the defining moments of the launch was the unveiling of the special Centenary mark, created to commemorate this extraordinary milestone in the history of the race.

The entry process begins on 25 August at 10:00 a.m. SAST, when entries open for Green Number runners, Yellow Number runners and Amabeadibeadi charity entrants.

The next phase follows on 2 September at 10:00 a.m. SAST, when entries open for Comrades Marathon Association members. This window will remain open for 72 hours or until the available entry allocation is filled, with places offered on a strictly first-come, first-served basis.

For general entrants, the process will move to a ballot system. General entries open on 9 September at 10:00 a.m. SAST, with runners able to enter the ballot until it closes on 22 September at 4:30 p.m. SAST. The ballot draw is then scheduled to take place on 23 September.

Several other crucial dates will shape the road to the historic race. The substitution period will run from 15 to 31 March 2027, while 3 May 2027 is the final deadline for runners to submit their qualifying performances, seeding information and other required entry details.

To qualify for the 2027 Comrades Marathon, runners must complete a 42.2km marathon in under five hours between 15 June 2026 and 3 May 2027.

The journey will finally culminate on Sunday, 13 June 2027, when thousands of runners are expected to line up for the historic 100th edition of the Comrades Marathon.

The 2027 race will represent a remarkable moment for the legendary South African ultramarathon. For more than a century, the Comrades Marathon has captured the imagination of runners and spectators with its extraordinary test of endurance, determination and human spirit. Its centenary edition will celebrate the generations of athletes who have faced its demanding roads, conquered its challenges and helped build one of the world's most respected endurance events.

For runners dreaming of becoming part of this historic occasion, the road to Comrades 2027 is now clearly marked. From the opening of entries in August 2026 to race day in June 2027, every deadline will matter.

The Greatest Story Ever Run is preparing for its most historic chapter yet.