

Protein sources for athletes: animal, plant and alternative proteins
The question of "Which types of protein are best for athletes?" is no longer limited to which protein source produces the largest acute stimulation of muscle protein synthesis. In contemporary sports nutrition there is also a second question: "can protein choices that support recovery and adaptation also be more sustainable?" This matters because diet is a major contributor to environmental impact. Estimates often place diet at roughly 20 to 30 percent of annual greenhouse ga
Oliver Witard
5 days ago7 min read


How much protein do athletes really need?
Is more protein better for muscle building? Is there a window of opportunity? What are the protein recommendations for athletes
Oliver Witard
Jul 18 min read


Lactate: from villain to fuel to hype?
For decades lactate was one of the most misunderstood molecules in exercise physiology. It became the villain of high-intensity exercise. Coaches blamed it for fatigue. Athletes blamed it for the burning sensation in their legs. Textbooks described it as a waste product that accumulated when oxygen delivery could no longer meet demand. That narrative was outdated 30 years ago but it still persists in places and is still passionately pursued by some coaches today. Now we hear
Asker Jeukendrup
Jun 177 min read


Nutrient timing: Does the "window of opportunity" really exist?
Few ideas in sports nutrition have been as influential, or perhaps as widely misunderstood, as the so-called "window of opportunity". During the 1990s the message appeared simple and compelling: consume carbohydrate immediately after exercise, ingest protein within 30 minutes, and avoid missing the critical recovery window. Over time these ideas became embedded in sports practice. Athletes built routines around them and many still worry that delaying a recovery drink by an ho
Asker Jeukendrup
Jun 56 min read


Allostasis in sport
If you have spent any time in elite sport, you will have met the athlete whose decline does not fit a neat narrative. Training looks appropriate on paper, their fuelling is “good enough”, and yet something unravels: performance stagnates, sleep becomes fragmented, mood darkens, minor infections become frequent, and the body starts to feel older than it should. In those moments, the language of sport tends to become diagnostic and disciplinary: overtraining, burnout, relative
Michael Gleeson
May 199 min read


Why understanding allostasis is essential in elite sport
Most people in sport agree on the basics: athletes improve by training, and “training load” matters. Increase load (sensibly) and you adapt. Increase it too fast, too far, or for too long, and fatigue rises, illness risk creeps in, and performance stalls or drops. Entire monitoring systems, dashboards, and coaching conversations are built around that logic. But there’s a problem hiding in plain sight: we often talk about “load” as if it means training and only training. In re
Asker Jeukendrup
May 68 min read


UCI Sports Nutrition Project: Nutrition in road cycling
The recently published UCI Sports Nutrition Project paper on road cycling provides one of the most comprehensive overviews to date of race nutrition in professional road cycling (1)(CLICK HERE). It was a privilege to bring together a group of scientists and practitioners working directly with WorldTour teams, to write a scientific paper and describe evolution or revolution of nutrition in this sport that is leading the way in applied sports nutrition. This paper aimed not to
Asker Jeukendrup
Apr 237 min read


When AI gets health questions wrong
A new BMJ Open paper highlights an important problem: fluent answers are not always accurate answers. People are turning to chatbots like ChatGPT and Gemini to get health advice, athletes and practitioners use it to get nutrition advice or updates… or performance advice. But how reliable are these chatbots when the topic is health, nutrition or performance? I was fortunate to be part of a group of established researchers that aimed to address exactly that question. In a stud
Asker Jeukendrup
Apr 155 min read











