1. How off are we from the "REAL NUMBER" in sports (TDF for example)?

Just imagine what we call 200w is not really the real number. Imagine it´s 250w. We're 50w off. Is it problematic? Well, if sensitivity of the measurement is good, probably it would not.

A 🧵without pictures. 2. We can definitely operate well - predictions, analysis, etc. being always 50w off. However, when other factors come to the table, that error will be more notorious. For example, when aerodynamicists add this number to their equations. The % error increases with consequences...

1/13 How much energy (Kcal) do trail runners expend in reality? A thread after testing pro athletes with DLW.

6 months ago, I changed my job to take a new opportunity. I changed sport discipline as well. Left cycling behind, and opened a new chapter in trail running and running.
2/13 Cycling is my life (the sport I grew up with) and it will be always be. I have learned almost everything I know in cycling. But growing up in Basque Country means mountains are part of our lives. Trail running as a sport has been always there.

I have been using this slide for >5 years to explain the nutritional approach we have been researching last years (and we still keep doing it).

- The core of it all is metabolism.
- The goal: To make athletes´ careers sustainable.

Sometimes it has been misunderstood.
A thread: We have investigated the effects of carbohydrate intake during exercise. Although it has been understood (misunderstood at times?) as the ultimate goal, the real one has been always to frame it within "nutrition guidelines" (as a whole).
Fuelling during exercise is only an excuse

I've been fortunate this week to chat with 2 professionals in sports science & communication for their respective podcasts. One recurring question was about the intake of 120g CHO/h during exercise and our studies. A perfect opportunity to provide a bit of context to the topic.

Taking advantage of the opportunity, I thought it would be cool to explain it here through a small thread.

1) What we did is to study a specific effect in a very specific context.



mdpi.com/2072-6643/12/5…
ncbi.nlm.nih.gov/pmc/articles/P…

1. Nitric Oxide (NO) pathway rise in interest in the health and performance fields. Diverse supplementation approaches ignite NO production, yielding multiple benefits, including adaptations from cell metabolism to whole-body physiology. 2. As physiologists, we have been always interested in the topic and some years ago we started a series of humble studies led by @MielgoAyuso, researching an emerging area: combined supplementation protocols to optimise NO pathway performance.

Let me introduce you:

Short threat on metabolism.

When discussing human energy budget, I have been always interested in understanding which one comes first: Energy intake or expenditure.

IMHO, first you need to "show capacity" (⬆️ your mito. function) and then "ask for resources" (⬆️energy intake). Why dogs 📸?

I have always looked at dogs (especially Balto😏), as they are a good example of what the mammalian metabolism can do. Sled dogs not only show an AMAZING mitochondrial function, but some interesting facts in energy budget.

Do you know how many kcal do they eat?

What does endurance metabolism look like in the current sport era? Are world´s greatest endurance athletes changing our way of understanding metabolic determinants?

Probably I'm wrong, but I want to explain a reflection based on what we learn from cyclists.

📸 @INEOSGrenadiers Traditionally fat metabolism (how we use fats) has been on the top of endurance research when aiming to explain performance determinants. In a nutshell, those with higher fat ox. rates, both in height (peak) and width (% intensity), have been postulated as potential winners.

Here we go with some random-interesting facts about lactate and metabolism. A dynamic threat where everybody can add interesting info. (following the order) about lactate and its implication in exercise, health, and disease metabolism.
#Lactatefacts by @Glut4Science and @MVAitor Let´s start learning!

1- Glycolysis byproduct that can be produced and utilized by various (almost every) body cell.
2- Highly dynamic metabolite as it can "travel" through different intra-extra cellular compartments.

#Lactatefacts by @Glut4Science and @MVAitor

FRUCTOSA Y RENDIMIENTO DEPORTIVO: Mucho más que 0,5 x glucosa, como dicta el ya famoso ratio 2:1 (glucosa:fructosa). Ayer escribí sobre ello en @glut4science y aquí va un hilo resumen que espero sea interesante. Si te pido que escribas en orden de prioridad las palabras Glucosa y Fructosa, y les des el tamaño de letra que les correspondería en cuanto a valor, ¿qué harías? Seguramente la GLU 1ª y la FRU (con la mitad de tamaño) 2ª.Voy a intentar que te lo pienses un poco más la próx. vez.