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A new study blows up the conventional wisdom about maximum protein doses for athletes.

One of the key articles of faith of modern sports nutrition is that your body can only use a certain amount of protein at a time. Opinions differ on what that amount is. It might be as little as 20 grams; it might be as much as 40 grams, particularly for older adults whose bodies are less sensitive to the muscle-growth-stimulating effects of protein. Maybe it needs to be expressed relative to body size, like 0.4 grams per kilogram of body weight, rather than as a fixed number. Those details don’t matter here; the point is that there’s a maximum.

The reason that’s important is that most North Americans eat lots of protein, but don’t spread it evenly throughout the day. A typical pattern might be 10 to 15 grams at breakfast and lunch, then 65 grams or more at dinner. That means that at breakfast and lunch, you’re not getting enough protein to max out the synthesis of new muscle protein. At dinner, on the other hand, you’re getting too much, so the excess will simply be burned for energy. The better solution, according to this logic, is to smooth out your protein consumption so that you’re getting at least 20 grams (or 40 or 0.4 grams per kilogram or whatever) at each meal, adding a protein-rich snack sometime during the day, and perhaps even another one right before bed.

That’s the conventional wisdom. So a recent study in Cell Reports Medicine from researchers at Maastricht University in the Netherlands, led by noted muscle physiologist Luc van Loon (whose vivid, no-nonsense advice I’ve written about previously), has generated plenty of buzz. In short, van Loon’s new data suggests there’s no upper limit on protein after all, and that huge doses of protein—they use 100 grams in the study, because that’s about how much protein they figured they could eat at a barbecue without force-feeding themselves—produce proportionately larger increases in the formation of new muscle.

The study involved 36 volunteers split into three groups. They each did a one-hour weight-training workout and then immediately downed a drink containing either 0, 25, or 100 grams of protein. The protein came from the milk of a Holstein cow that the researchers injected with a special carbon isotope tracer. This meant that one of the amino acids in the milk had a slightly different chemical form than usual, enabling the researchers to track the progress of the protein drink as it was digested and incorporated into new muscle proteins in the subjects’ bodies. (I once interviewed one of van Loon’s postdocs about an earlier “glowing cow” experiment, and he described the unexpected responsibilities he had to take on: “My job was to talk to them, brush them, and basically keep them in a good mood,” he recalled. “If the animal becomes stressed, milk production declines, so we treated them like princesses.”)

Anyway, the next part of the experiment basically involved sitting around for 12 hours and taking a bunch of blood samples and muscle biopsies to figure out what was happening in the subjects’ muscles following the exercise-protein combo. That combination is important: both resistance exercise and eating protein boost the formation of new muscle protein, but putting them together within a window of four to six hours produces a muscle-building effect that’s greater than the sum of its parts. The full suite of measurements and analysis is extremely complex (and free to read about, if you’re interested), but the most important parameter is how much new muscle protein is being synthesized, because that’s what (more or less) dictates how much muscle you’ll gain over time.

There are two key things about the study. One is the time frame: most previous studies only monitored muscle protein synthesis for six hours or less, so 12 hours provides a much longer window for the effects of a big protein dose to show up. The second is the protein dose: previous studies topped out at 45 grams, so it may have been hard to see big differences compared to, say, 20 or 30 grams.

Here’s the key result, showing protein synthesis over the 12 hours following the workout and protein drink. Black circles are the 100-gram group; grey circles are the 25-gram group; and white circles are the 0-gram control group:

The effect isn’t subtle: the 100-gram group is getting way more protein synthesis than the 25-gram group right away. And the biggest difference comes after the six-hour (i.e. 360-minute) mark: by that point, the 25-gram group is back to baseline, while the 100-gram group still hasn’t gone back to baseline even after 12 hours. The extra protein synthesis isn’t exactly proportional—that is, four times more protein doesn’t give you four times the synthesis—but it’s substantial.

There’s a straightforward conclusion here, which is that the idea of a maximum protein dose—at least, one at 40 grams or less—was wrong. You always want to be cautious about chucking away a whole bunch of seemingly settled science on the basis of a single study. But this study seems solid, and it has identified some clear gaps—in duration and protein dose—in the earlier studies that it’s overturning. So let’s assume for now that it’s correct. The question, then, is what it means for how athletes should eat.

For practical purposes, the real apples-to-apples comparison would have been 100 grams of protein versus four doses of 25 grams spaced four hours apart. Which pattern would produce more protein synthesis in that comparison? Nobody knows at this point. There are a bunch of other reasons that I’ll be sticking with three meals a day, including the fact that I really enjoy all my meals. As an endurance athlete, I’m also as conscious of my carbohydrate supply as I am of protein. And even for protein and muscle-building, there are lots of unanswered questions—like whether you’d need to time your workout around your 100-gram protein bomb. If I lift weights in the morning then get all my protein in the evening, or vice-versa, does that still work?

There are certainly people who are into the one-meal-a-day thing, and for these people this is an important result. In their discussion, van Loon and his colleagues note that their findings suggest that time-restricted feeding shouldn’t necessarily lead to muscle loss. For me, the main takeaway is that it’s probably not as important as I once thought to spread my protein perfectly throughout the day. That won’t change how I actually eat, because getting 25 grams of protein at every single meal has always been more aspiration than reality—but at least I’ll feel less guilty about it

Melissa Jefferson-Wooden delivered a sensational performance in Budapest, storming to victory in the women’s 100m at the inaugural World Athletics Ultimate Championship in a breathtaking 10.62 seconds.

The American produced a superb display of acceleration and composure to claim the World Ultimate Championship title while recording the fastest women’s 100m time in the world this year. Her 10.62 mark underlined her exceptional form and placed her firmly at the top of the global sprinting hierarchy.

Jefferson-Wooden controlled the race through the decisive stages and maintained her form all the way to the finish to secure a statement victory against a field packed with championship pedigree. She crossed the line ahead of Olympic champion Julien Alfred, who clocked 10.74 seconds with a -0.2 m/s wind, while Sha’Carri Richardson took third in 10.76.

Women’s 100m Final

1. Melissa Jefferson-Wooden — 10.62

2. Julien Alfred — 10.74 (-0.2 m/s)

3. Sha’Carri Richardson — 10.76

The victory was especially significant given the quality of the opposition. Jefferson-Wooden held her nerve against Alfred and Richardson, two of the most accomplished sprinters of the current generation, to produce the fastest performance in the world this year when it mattered most.

Alfred once again demonstrated her consistency at the highest level by taking silver, while Richardson completed an all-star podium in a race that brought together three of the biggest names in women’s sprinting.

But beyond the time, the title and the celebration, one of the most touching moments came after the race when Jefferson-Wooden embraced her father, Melvin, in an emotional celebration.

Their moment carried a deeply personal meaning. When Melissa was just 17 years old, she donated her stem cells to help her father undergo a bone marrow transplant after he was diagnosed with myelodysplastic syndrome. Years later, the two shared an unforgettable embrace in Budapest after she had become the World Ultimate Champion.

For Jefferson-Wooden, however, the evening was about far more than a medal. It was the culmination of an extraordinary journey, now highlighted by a world-leading 10.62 seconds on one of the biggest stages in athletics.

With the Ultimate Championship title secured and her father by her side, Jefferson-Wooden leaves Budapest with more than being an ultimate champion. She leaves with momentum, confidence and a powerful statement of intent — turning a high-profile showdown into one of the defining sprint performances of her season.

Audrey Werro has added another major title to her extraordinary season, storming to victory in the women’s 800m at the inaugural World Athletics Ultimate Championships in Budapest.

The Swiss star delivered a commanding performance, taking control from the opening gun and refusing to surrender the lead as she powered through an absorbing battle against two of the biggest names in the event.

Werro stopped the clock at 1:55.88 to become the Ultimate Championships 800m champion, producing another statement performance on one of the sport’s newest and most prestigious stages.

Behind her, Great Britain’s Keely Hodgkinson fought her way to second in 1:56.26, while the Netherlands’ Femke Broeders-Bol completed the podium in 1:56.74.

The result once again brought together the same formidable trio that featured on the podium at the European Championships, but Werro again proved to be the athlete who could rise above the challenge when it mattered most.

Her Budapest triumph is the latest chapter in a season that has already included records, a successful Diamond League Trophy defence and European Championship gold. Now, she can add the Ultimate Championships crown to a growing list of accomplishments.

Werro’s consistency has been particularly impressive in an 800m event packed with elite talent. Rather than simply relying on a fast finish, the Swiss athlete showed her authority by taking the initiative from the beginning and maintaining enough strength and composure to hold off Hodgkinson and Broeders-Bol all the way to the line.

The victory also underlined the remarkable depth of the women’s 800m, with three athletes separated by less than a second at the finish. Hodgkinson’s 1:56.26 and Broeders-Bol’s 1:56.74 showed just how fiercely contested the race was, but Werro’s decision to dictate the pace ultimately gave her the decisive advantage.

For Werro, this was more than another medal. It was another opportunity to demonstrate that her rise is no passing moment. On a stage featuring established champions and elite rivals, she once again produced the performance required to claim the biggest prize.

For Hodgkinson, the silver medal adds another major podium finish, while Broeders-Bol once again demonstrated her ability to compete with the very best over two laps.

But the spotlight in Budapest belonged unmistakably to Werro.

With another championship crown secured, the Swiss star has strengthened her claim as the athlete setting the standard in women’s 800m running. This is Audrey Werro’s era — and the rest of the field is chasing.

Busang Collen Kebinatshipi has delivered another sensational performance, storming to victory in the men’s 400m at the inaugural World Athletics Ultimate Championship in Budapest.

The reigning world champion stopped the clock at an astonishing 43.39 seconds, smashing his own Botswana national record and moving to fifth on the world all-time list.

Kebinatshipi produced a commanding finish to pull away from his rivals and secure the Ultimate Championship title. American star Rai Benjamin finished second in 44.15, while Jereem Richards of Trinidad and Tobago completed the podium in 44.23.

 Men’s 400m

1. Busang Collen Kebinatshipi — 43.39 NR

2. Rai Benjamin — 44.15

3. Jereem Richards — 44.23

The performance is even more remarkable considering that Kebinatshipi had already rewritten the Botswana record just one week ago in Brussels, where he ran 43.40. In Budapest, he lowered that mark by another 0.01 seconds to establish a new national record of 43.39.

That improvement has also propelled the 22-year-old into rare territory. His latest time now ranks him fifth fastest in history over 400m, placing him among an extraordinary group of athletes who have broken the 43.40 barrier.

Kebinatshipi's victory also caps an extraordinary season for the Botswana star. After establishing himself as a global champion, he has continued to demonstrate that he belongs among the very best one-lap runners in the world.

And there is a major reward for his historic night in Budapest: Kebinatshipi walks away as the Ultimate Champion and $150,000 richer.

From another national record to a place among the five fastest 400m runners ever, Kebinatshipi has turned an already remarkable season into something truly special.

Botswana has its latest sprinting superstar — and Kebinatshipi is showing that his ceiling may be even higher than anyone imagined. 

Marileidy Paulino once again proved why she is the undisputed queen of the one-lap event, powering to victory in the women’s 400m at the inaugural World Athletics Ultimate Championship in Budapest.

The Dominican Republic superstar produced a sensational 49.07 seconds to claim gold, pulling decisively away in the final straight and holding off a fiercely competitive field to extend her remarkable unbeaten run.

Paulino delivered her trademark combination of controlled speed and devastating finishing strength. She remained firmly in contention through the opening stages before unleashing her decisive move down the home straight, where she quickly opened a gap on her closest challengers.

Norway’s Henriette Jæger mounted a strong challenge but could not match Paulino’s finishing speed, crossing the line second in an impressive 49.28. Jamaica’s Nickisha Pryce completed the podium after clocking 49.56, ensuring that three of the world’s leading 400m talents occupied the medals.

The result once again underlined Paulino’s extraordinary consistency at the highest level. She entered Budapest as the world leader after running 48.48 in Paris in June, a performance that also set a Diamond League record. She subsequently remained unbeaten throughout her Diamond League campaign, closing the circuit with a meeting-record 48.64 in Brussels.

Budapest has also become a special venue in Paulino’s career. Three years ago, at the same National Athletics Centre, she captured her first individual world title, marking the beginning of another dominant chapter in her career. She later added Olympic gold in Paris in 2024, further establishing herself among the defining 400m athletes of her generation.

The inaugural World Athletics Ultimate Championship has brought together the sport’s biggest stars in a new winner-takes-the-spotlight format, with Olympic and world champions, Diamond League winners and leading performers competing for ultimate honours.

For Paulino, the occasion once again ended with Ultimate Crown on her arms.

With 49.07 seconds, she did more than win another major 400m title. She delivered another statement of authority, powering through the final straight with the confidence and speed that have made her one of the most dominant figures in modern women’s athletics.

Marileidy Paulino remains unbeaten, remains relentless and, once again, remains the queen of the one lap.

Jakob Ingebrigtsen has made a major decision regarding the remainder of his World Athletics Ultimate Championship campaign, confirming that he will withdraw from the men’s 1500m in Budapest despite producing a sensational performance to win the 5,000m title.

The Norwegian superstar stormed to victory in the inaugural Ultimate Championship 5,000m on Friday night, clocking a season-best 12:59.24 and delivering a devastating finishing kick to defeat Olympic 5,000m champion Cole Hocker and American Parker Wolfe.

Ingebrigtsen’s final 100 metres was arguably the defining moment of the race. The Olympic champion produced a remarkable 12.60-second closing 100m, powering away from the field to secure the $150,000 winner’s prize and underline just how far his fitness has progressed since returning from Achilles surgery.

The victory was particularly significant after what has been an extremely difficult period for the 25-year-old. Earlier in the season, Ingebrigtsen faced serious uncertainty over whether he would even be able to compete at the highest level again. His return has gradually gathered momentum, and his performance in Budapest offered perhaps the clearest indication yet that the Norwegian is rediscovering his formidable racing ability.

But rather than risk pushing his recovering body further, Ingebrigtsen has now opted to step away from the 1500m.

The decision means the highly anticipated showdown with British rival Josh Kerr will not take place in Budapest after all. The two stars had been expected to renew one of the biggest rivalries in modern middle-distance running in the 1500m final.

Instead, Ingebrigtsen is looking beyond the immediate opportunity and towards the bigger picture.

“I’m thinking about 2027… Fitness cannot be faked,” the Norwegian said, signalling that protecting his long-term condition has become more important than chasing another major victory only days after his return to peak-level competition.

The decision comes just one week after an emotionally charged Diamond League Final in Brussels, where Ingebrigtsen finished fourth in the 1500m behind Australia’s Cameron Myers, Kenya’s Phanuel Kipkosgei Koech and American Ethan Strand.

After that race, Ingebrigtsen delivered a fiery assessment of his rivals and questioned the tactics surrounding the pacemaking, particularly involving Hocker. He later acknowledged that there had been “a little too much adrenaline and emotion” when microphones were placed in front of him immediately after the race.

Yet his latest decision shows that beneath the emotion and competitive intensity lies a longer-term strategy.

Ingebrigtsen has already demonstrated that he can compete at an elite level again. His 12:59.24 in Budapest was not simply a victory — it was a statement that the Norwegian remains capable of producing a world-class finish even after months of injury rehabilitation.

Now, however, he is choosing not to gamble with that progress.

For a runner who has spent much of the year fighting his way back from injury, another 1500m race could have offered enormous rewards but also carried unnecessary risk. By withdrawing, Ingebrigtsen is effectively prioritising longevity over one more opportunity for immediate glory.

His message is clear: the comeback is underway, but it will not be rushed.

The 5,000m victory has given Ingebrigtsen confidence, momentum and perhaps, most importantly, proof that his body can once again handle elite competition.

Now comes the harder part — knowing when to stop.

With 2027 already firmly in his sights, the Norwegian has chosen recovery over risk. And after everything he has endured, that could ultimately prove to be one of the most important decisions of his comeback.

Jakob Ingebrigtsen is not walking away from the sport. He is protecting his future in it.