Running News Daily

It’s not all about height and weight. 

New research suggests incorporating waist circumference into how we predict health outcomes, instead of relying on BMI. 

Study authors say BMI does not take into account muscle mass or the links between abdominal fat and poorer health, among other downfalls of the measurement. 

In an effort to understand how body composition affects health, most medical professionals and researchers still use the body mass index (BMI), but this has always been a problematic and controversial method when actually applied to individuals, rather than large populations. For example, commentary in the British Journal of General Practice, published back in 2010, called use of BMI unethical, overly simplistic, and potentially harmful to a significant proportion of patients. 

A new study in JAMA Network Open assessed a possible pivot toward a different measurement tool: the body roundness index, or BRI. In addition to weight and height (which is all that the BMI includes), the BRI considers waist circumference because that can more comprehensively reflect visceral fat distribution, according to the study’s lead author Xiaoqian Zhang, M.D., at Beijing University of Chinese Medicine in China.

In the cohort study involving nearly 33,000 U.S. adults, researchers looked at the association between an increase in BRI from 1999 to 2018 and the significant rise in all-cause mortality (particularly cardiometabolic disease, kidney disease, diabetes, and cancer) during the same period. 

More abdominal fat has been linked to higher risk of these conditions because this type of fat is often visceral, which means it wraps around your organs instead of sits just under the skin. That means it can increase inflammation and drive more chronic diseases, Zhang told Runner’s World. For example, one study of Korean adults found those with normal body mass index had more cardiovascular risk factors if they carried excess abdominal obesity. 

“Because of the way it includes waist circumference, BRI effectively provides a more accurate indication of health problems related to being overweight or underweight,” Zhang said. “We found both the lowest and the highest BRI values are associated with significantly increased risks of all-cause mortality.”

The Problem with BMI

Considering a switch away from BMI involves understanding why this effort matters. BMI was not meant to be used on an individual level. It relied only on Belgian men (because it was a formula devised in the 1830s by a Belgian mathematician) and did not take women and/or non-Caucasians into account, the British Journal of General Practice authors noted. As other researchers note, it was also not meant to inform medicine or predict health outcomes

By looking only at height and weight, the BMI might measure general obesity but it doesn't distinguish body fat from muscle mass, said the recent study’s co-author Wenquan Niu, Ph.D., at the Center for Evidence-Based Medicine in China. Because of this, for example, many bodybuilders are classified as obese.

“Fat distribution and body composition can vary dramatically among individuals who have the same BMI,” he told Runner’s World. “That’s why we need a more accurate indication of health problems related to overweight or underweight. Using the BRI is more helpful for this, given the limitations of the BMI metric.”

What to Know About Waist-to-Hip Ratio

The BMI and BRI are not the only possibilities when it comes to body composition. One that’s easy to measure at home is hip-to-waist ratio (WHR), which involves measuring both of those and then dividing your waist number by your hip number. According to a study published in JAMA Network Open in 2023, the ideal ratio for most men is below 0.95 and under 0.85 for women.

Even if you’re physically active and are not overweight, the WHR can help identify your risk of future metabolic issues, because abdominal fat plays a significant role in issues like insulin resistance and hypertension, according to Vitor Engrácia Valenti, Ph.D., a researcher at Sao Paulo State University in Brazil who has done work on body composition. 

“The BMI calculation is far less helpful than your WHR, which can give you an indication of whether your waist circumference is outside the normal range,” he told Runner’s World. 

Other indicators of body composition are lean muscle mass and fat mass, but those require specialized equipment such as a DXA scan for accurate numbers, Valenti added. 

In general, the goal shouldn’t be reducing body fat as much as possible—you do need body fat for overall health—but to focus on reduction of abdominal fat in particular. 

Although “spot training” for this type of fat is not a possibility, a systematic review and meta-analysis published in Advances in Nutrition looked at 43 studies focusing on training styles and their effects. Researchers found that although aerobic exercise tends to produce slightly greater efficacy in decreasing belly fat, the biggest change comes when it’s combined with resistance training.

Ethiopia delivered a remarkable double victory at the 2026 Bank of China Hong Kong-Zhuhai-Macao Bridge Half Marathon on Sunday, November 15, with Wede Kefale and Addisu Gobena emerging victorious in the women's and men's races respectively.

Staged along the spectacular Hong Kong-Zhuhai-Macao Bridge, the event brought together some of the finest distance runners from Ethiopia, Kenya, South Africa and other nations for a fiercely contested 21.097-kilometre challenge across one of the world's most recognisable sea-crossing structures.

The competition produced impressive performances, with Ethiopia showcasing its depth in distance running while Kenyan athletes also secured several places among the leading finishers.

In the women's contest, Kefale produced a composed and determined performance to secure the biggest prize of the day. She crossed the finish line in 1:09:01, holding off a strong challenge from South Africa's Glenrose Xaba, who finished second in 1:09:09. Ethiopia's Fantu Worku completed the podium in 1:09:14, making it an exceptionally close battle among the leading three women, who were separated by just 13 seconds.

The Ethiopian victory was particularly impressive given the quality of the field. Xaba, one of South Africa's leading distance runners, pushed hard throughout the contest but ultimately had to settle for second, while Worku demonstrated Ethiopia's remarkable strength by securing another podium position.

Kefale's victory was supported by an impressive Ethiopian presence throughout the top 10. Baraky Redae finished fourth in 1:09:51, followed by compatriot Asmarech Anley in fifth with 1:10:21. Kenya's Miriam Chebet was sixth in 1:11:05, ahead of Morocco's Fatima Ezzahra Birdaha, who clocked 1:11:23. Kazakhstan's Daisy Jepkemei placed eighth in 1:11:42, while Ethiopia's Zewudie Wudu finished ninth in 1:12:08. Kenya's Priscah Jepleting Cherono completed the top 10 in 1:12:29.

The men's race provided another memorable moment for Ethiopia as 22-year-old Addisu Gobena claimed the overall victory, He clocked 1:01:33 to finish ahead of compatriot Aliyi Kasim, who secured second place in 1:02:29.

Kenya's Alex Lenalepisho delivered a strong performance to take third in 1:02:47, preventing a complete Ethiopian sweep of the men's podium. Morocco's Othmane El Goumri finished fourth in 1:03:07, while Kenya's Abel Kiplimo followed in fifth with 1:03:33

Kenyan representation remained particularly strong throughout the men's top 10. Ezra Kipketer Tanui finished sixth in 1:05:32, followed by Ethiopia's Tafere Adisu in seventh with 1:05:35. Kenya's Meshack Kipchirchir placed eighth in 1:06:01, Benard Kipkorir was ninth in 1:06:15, and compatriot Sena Ledama completed the top 10 in 1:06:21.

Gobena's triumph adds another impressive achievement to Ethiopia's growing presence on the international road-running circuit, while the performances of Kasim and Lenalepisho underlined the competitive depth of the men's field.

The 2026 edition was also significant for the event itself, having earned World Athletics Platinum Label status, placing it among the highest-rated road-running competitions internationally. The bridge provided a spectacular setting for the contest, bringing together elite athletes from different countries for a memorable day of long-distance racing. 

Beyond the podium, the results highlighted the international character of the competition, with athletes from Ethiopia, Kenya, South Africa, Morocco and Kazakhstan featuring prominently in the leading positions.

Ethiopia therefore left Hong Kong with both overall titles, while Kenya had plenty of reasons to take encouragement from its strong representation across both races.

For the organisers, the successful staging of this Platinum Label competition represents another important milestone in the development of road running in Hong Kong. For the athletes, it was an opportunity to test themselves against international opposition on a distinctive course that offered a memorable backdrop to the racing.

American sprint sensation Noah Lyles could be preparing to chase one of the most extraordinary achievements in athletics history after dropping a tantalising hint about his ambitions for the 2027 World Athletics Championships in Beijing, China.

The four-time world 200m champion has sparked excitement among athletics fans after sharing a cryptic message on social media reading “4x ? 2027”, raising speculation that he could be targeting an unprecedented four gold medals when the global championships return to the iconic Bird’s Nest Stadium.

Although Lyles has yet to confirm exactly which events he intends to contest, the possibility of a four-event campaign has become particularly intriguing following World Athletics’ announcement that the mixed 4x100m relay will make its World Championships debut in Beijing.

Such an opportunity could open the door for the American superstar to compete for gold in the men's 100m, 200m, men's 4x100m relay and the newly introduced mixed 4x100m relay.

For Lyles, Beijing could represent much more than another opportunity to add to his impressive collection of championship medals. It could be the stage where he attempts to establish himself as the most successful male athlete in World Athletics Championships history.

The 100m would undoubtedly be one of his biggest attractions. Having claimed the world title in Budapest in 2023 before completing his remarkable rise to Olympic glory at the Paris 2024 Games, Lyles knows exactly what it takes to rule the world's premier sprinting stage. However, he will be eager to reclaim the global crown after settling for bronze behind compatriots in the 2025 World Championships in Tokyo.

The 200m, meanwhile, remains his strongest territory. Lyles has established an extraordinary legacy over the half-lap distance, winning four consecutive World Championships titles in 2019, 2022, 2023 and 2025. In Tokyo, he matched Usain Bolt's remarkable achievement of four successive world 200m crowns, further strengthening his reputation as one of the greatest performers the event has ever witnessed.

His ambitions would also extend to the relays, where he has repeatedly demonstrated his value to Team USA. Lyles has already collected four World Championships gold medals in the men's 4x100m relay, including victories in 2019, 2022, 2023 and 2025. Another successful campaign in Beijing would provide an opportunity to add to that impressive record.

The introduction of the mixed 4x100m relay could make the challenge even more fascinating. With the event officially scheduled to make its World Championships debut in Beijing, the competition will offer another opportunity for the world's leading sprinters to showcase their speed on the global stage.

Beyond the possibility of four gold medals, however, there is an even bigger historical prize waiting for Lyles.

The American currently boasts eight World Athletics Championships gold medals. Winning four more in Beijing would take his career tally to 12, moving him beyond Jamaican sprint legend Usain Bolt, whose 11 world titles remain the benchmark for male athletes in the competition's history.

That would be a remarkable achievement for an athlete who has never hidden his admiration for Bolt and his desire to reach the heights established by the Jamaican legend.

Interestingly, the Bird's Nest Stadium carries its own special place in sprinting history. It was at the same venue during the 2008 Beijing Olympic Games that Bolt announced himself to the world with his breathtaking performances in the 100m, 200m and 4x100m relay. Nearly two decades later, the iconic stadium could provide the setting for another extraordinary chapter in sprinting history.

For Lyles, the challenge will be enormous. Successfully navigating four demanding events, managing the competition schedule and delivering at the highest level across individual and relay races would require exceptional preparation, consistency and teamwork.

Nothing has yet been confirmed regarding his participation in all four disciplines, but his intriguing message has certainly given athletics followers something exciting to anticipate.

Could Beijing 2027 become the championship where Noah Lyles transforms an ambitious dream into an unforgettable reality?

Four events, four potential gold medals and the possibility of surpassing one of the greatest sprinting legends of all time. The countdown to Beijing promises to be fascinating.

What began as one of the most entertaining and talked-about stories of the 2026 New York City Marathon has taken an unexpected turn, with Houston-based lawyer Andrea Sager losing her official race result after a viral video showed her smoking marijuana during the event.

The 35-year-old mother of two attracted widespread attention on November 1 when she lined up for the iconic 26.2-mile race wearing a bright pink running vest carrying a humorous personal advertisement: “Andrea, 35, Single. Great Credit. Bad Judgment.” The unusual message quickly made her one of the most recognizable personalities among the thousands of participants, generating plenty of reactions from spectators and social media users.

However, it was another moment captured on camera that eventually landed her in trouble with race organizers. A video circulating online showed Sager accepting a puff of marijuana from a spectator while running along the marathon course, turning what had initially been a lighthearted appearance into a much bigger controversy.

Following the circulation of the footage, New York Road Runners (NYRR), the organization responsible for staging the marathon, removed Sager's finishing time of 5:54 from the official results after determining that she had violated its Code of Conduct. The regulations prohibit smoking, vaping and the use of tobacco or marijuana products in the starting corrals, along the course and within the designated race areas.

Despite the disqualification, Sager was allowed to retain her physical finisher's medal, meaning she still has a memento of completing the demanding journey through New York's five boroughs, even though her official finishing result no longer stands.

Sager has since offered an explanation for her decision, revealing that she was struggling physically as the race progressed. With considerable discomfort in her legs and the marathon becoming increasingly difficult, she said she accepted the offer from a spectator in an attempt to manage the pain and make the remaining miles more bearable.

Interestingly, the controversy has not entirely dampened her enthusiasm for the experience. Rather than retreating from the attention, Sager has embraced the unexpected publicity, revealing that the viral moment has brought considerable interest on social media and dating platforms.

Her distinctive pink running vest has also become a talking point beyond the marathon, with the attention opening up potential opportunities for merchandise and brand partnerships inspired by the memorable message.

Although she initially challenged the decision, Sager has acknowledged that the organizers were enforcing their regulations and appears to be taking the outcome with a sense of humour. She has also indicated that she could return to the marathon distance in the future, suggesting that her New York experience may not be her last.

For Sager, the 2026 New York City Marathon will undoubtedly be remembered for reasons far beyond the challenge of covering 26.2 miles. She arrived at the starting line hoping to enjoy her first marathon and perhaps attract a little attention with her unusual outfit. Instead, she left with a viral story, unexpected publicity and a disqualification that has made her one of the most talked-about recreational runners from this year's event.

Her finishing time may have disappeared from the official results, but her story has certainly found a place in the conversation surrounding this year's marathon.

After all, completing a marathon is an achievement in itself, but Andrea Sager's New York experience came with a twist that few runners could have anticipated!

World mile record holder Josh Kerr has sparked an interesting conversation among runners after questioning the growing popularity of hydration vests, suggesting that many athletes may be carrying more equipment than they actually need for their everyday training sessions.

The British distance-running star shared his thoughts during a Reddit Ask Me Anything session hosted by BBC Sport on Monday, where he responded to questions from fans about training, competition, rivalries and some of the lighter aspects of his life as an elite athlete.

Among the most relatable topics was the increasing use of hydration vests, a piece of equipment that has become increasingly common among recreational runners, particularly those who head out for regular training sessions.

Kerr offered a straightforward perspective, suggesting that runners covering distances of less than 12 miles (approximately 19 kilometres) generally do not need to carry water with them. He believes that some running trends are driven more by marketing than genuine necessity, using hydration vests as an example of equipment that has perhaps become more popular than it needs to be.

He further pointed out that runners training in urban environments can usually find somewhere to purchase a drink if they need one, rather than carrying additional equipment throughout their entire run.

However, his comments were not intended as a universal rule for every athlete. Hydration requirements differ depending on individual needs, weather conditions, training intensity and the distance being covered. Runners tackling longer distances, particularly in hot conditions or on remote trails, may still benefit considerably from carrying their own fluids.

Away from the equipment debate, Kerr also addressed questions about his relationship with Norwegian distance-running superstar Jakob Ingebrigtsen. Keeping his response brief and humorous, the Briton remarked, "I wouldn't say we're buddies!" However, he acknowledged that rivalries are an important part of athletics and can help make the sport more exciting for competitors and spectators alike.

The 2024 Paris Olympic Games also featured prominently in the discussion, particularly the men's 1500m final, where Kerr secured the silver medal in a British record of 3:27.79 behind American Cole Hocker.

Despite narrowly missing out on Olympic gold, Kerr insisted that he had no regrets about how he approached the race, reflecting the confidence and competitive mentality that have helped establish him among the leading middle-distance runners in the world.

The Scottish star also offered fans a glimpse into the demanding training sessions behind his remarkable mile world record, providing insight into the preparation required to compete at the highest level. He additionally touched on the possibility of eventually moving up to the marathon, a prospect that will undoubtedly attract considerable interest given his credentials over shorter distances.

Not every question, however, was about world records, Olympic medals or gruelling workouts. In one particularly amusing moment, Kerr was asked how far he thought he could run on just a single square sausage and a can of Irn-Bru, bringing a distinctly Scottish flavour to the conversation.

The exchange offered a refreshing look at the personality behind one of Britain's biggest athletics stars, showing that even athletes operating at the very highest level have plenty of opinions about everyday running habits.

For recreational runners, Kerr's message about hydration vests is certainly worth considering, although individual circumstances should always determine what equipment is necessary. His broader point was simple: runners should understand their actual training needs rather than automatically following every new trend in the running industry.

Kenyan marathon star John Korir is preparing to chase a remarkable piece of history at the 2026 Valencia Marathon, where victory could make him the first male athlete in more than two decades to successfully defend the prestigious title.

The 30-year-old, who will celebrate his birthday just four days before the December 6 race, returns to Spain with an opportunity to achieve something that has proved exceptionally difficult in the history of the competition. Having conquered the Valencia streets last year in an outstanding 2:02:24, Korir now has his sights firmly set on becoming a two-time consecutive champion.

A successful defence would place Korir in an exclusive group of athletes who have managed to win Valencia's men's marathon twice. The race's historical records identify only three previous multiple winners: Teodoro Pérez, Eduardo Alcaína and Samuel Tangus. Tangus remains the last man to achieve consecutive victories, having triumphed in 2002 and 2003.

Korir's opportunity has become even more promising following the withdrawal of Ethiopian star Yomif Kejelcha, who was ruled out of the December 6 contest because of an injury. Kejelcha had been among the biggest attractions in the anticipated showdown. His absence removes a major challenger and leaves Korir as one of the leading favourites heading into the race.

The Kenyan's recent performances explain why expectations are so high. He has established himself among the world's most formidable marathon runners, collecting major victories in Chicago in 2024, Boston in 2025, Valencia in December 2025 and Boston again in April 2026. His latest Boston triumph was particularly impressive, as he successfully defended his crown in a spectacular course-record time of 2:01:52.

However, Korir is not returning simply to defend his title. He has much bigger ambitions, with reports indicating that he is targeting a historic sub-two-hour performance on Valencia's famously fast course. To prepare for that challenge, the Kenyan has reportedly increased his training volume to between 250 and 270 kilometres per week, demonstrating the scale of preparation behind his ambitions.

Breaking the two-hour barrier would be an extraordinary achievement, particularly on a course where the current men's record stands at 2:01:48, set by Ethiopia's Sisay Lemma in 2023. Korir already knows what it takes to deliver a major performance in Valencia, having produced a commanding victory last year.

Turning 30 just days before the competition, Korir appears to be entering an exciting period of his marathon career. His combination of experience, consistency, confidence and remarkable endurance makes him a serious contender not only for another victory but also for a possible assault on the course record.

For Korir, December 6 represents an opportunity to go beyond another major marathon victory. He could end a 23-year wait for a consecutive men's champion in Valencia, join an exclusive group of multiple winners and potentially deliver one of the fastest marathon performances ever witnessed.

The challenge is now clear: defend his crown, make history and perhaps bring the world closer to another landmark moment in marathon running.