Is more carbohydrate better during exercise? What the evidence says about 90, 120 and 150 g/h
For many years the guideline for carbohydrate during long endurance exercise has been 90 g/h. Athletes now go well beyond 120 g/h. What does the evidence say?
Asker Jeukendrup
1 hour ago14 min read
Best carbohydrate for performance: does the evidence support the hype?
Carbohydrate ingestion during exercise worksbut what is the best carbohydrate for performance? Whether newer carbohydrate products, such as modified starches and hydrogels, and low-carbohydrate protocols improve endurance performance beyond well-established carbohydrate nutrition strategies, is the subject of discussion.
Mike Ormsbee
3 hours ago6 min read
How is exogenous carbohydrate oxidation measured?
When a study reports that athletes oxidised 60 g of an ingested carbohydrate per hour, it sounds as simple as measuring heart rate. It is not. Measuring exogenous carbohydrate oxidation, a method sometimes referred to as 13C carbohydrate oxidation or carbon-13 breath tests, requires a deeper understanding of biochemistry, physiology, and stable isotope tracer methodology. Carbon-13 testing services are now also offered commercially, but they all use shortcuts to make them eas
Asker Jeukendrup
7 hours ago18 min read
The omega-3 index: what does it tell an endurance athlete?
The omega-3 index measures EPA plus DHA in red blood cells. Athletes average 4.4%, and fish oil lowers heart rate and oxygen cost but has not been shown to improve endurance performance.
Oliver Witard
Oct 57 min read
Fish oil and injury: what can it protect?
Fish oil is often recommended after injury. This blog looks at what the studies show for muscle loss during immobilisation, muscle soreness and concussion.
Oliver Witard
Oct 58 min read
Do you have a food allergy or intolerance? What athletes need to know
Most athletes believe they're food sensitive, but only 1 in 100 reacts in allergy testing. Learn why IgG tests don't work and what you should be doing if you experience symptoms.
Asker Jeukendrup and Mike Gleeson
Sep 277 min read
Food sensitivity tests: what do they measure, and what do the allergy societies say?
Home tests for food sensitivities, intolerances and allergies are often promoted but do they give the right answer?
Asker Jeukendrup and Mike Gleeson
Sep 227 min read
How do you decide whether a supplement is worth the risk?
Prevalence estimates for supplement use in athletes commonly range from about 40% to 70%, depending on the sport, the competitive level, the age and sex of the group. It also depends on methodology; how the survey was done. Most athletes and coaches ask the question: does it work? That is a reasonable question, and for a small number of supplements we can answer it well, although it is hardly ever a "yes" or "no", it is usually a answer that is more like “maybe but it depends
Asker Jeukendrup
Sep 36 min read
