médecine médecine du sport vidéo

Lactate shuttle

I am not a huge fan of Rhonda Patrick to say the less but this interview with Pr George Brooks from Berkeley is good. It’s a great introduction to Pr Brooks theory of lactate shuttling. He has fought the idea that lactataemia is due to an oxygen debt and prove that there is a lactate production even with plenty of oxygen and that lactate is a fuel source for cells, a source for neoglucogenesis and a signaling molecule.

Pour une histoire écrite, avec des références, je vous conseille cet article :

freak sport triathlon

Training strategy for 2021 v2

This article is an update of the previous one. I have mostly done Z2 training since the middle of september and I had time to reflect back on this and stuff like HIIT and VLamax…

In the midst of the COVID-19 pandemic I look for new challenges. I like sports and I like to train. Having strategies to test boosts my sports endeavors.

The challenge of racing is fun and with tapering days and recovery periods it gives a nice rhythm and flow to the year, but these days, with all the unknown ahead, I like the idea of relieving the pressure of an A race and just enjoy the process of doing sports regularly.


  • zone 2 training becomes the bread and butter of training, sometimes low cadence work to try to modulate muscle fiber types
  • I will favor 4×8 min to boost VO2max and FTP, I will work on a high cadence on these to maximise stroke volume adaptations
freak sport triathlon

Finding a new balance

Hi guys !

Another short post in line with the previous one since I incline with more and more trust to my Garmins’ algorithms to guide workouts and recovery. (The watch might be an excuse to keep some geek traits in my personality but just taking it easy is the new motto. Good is good enough !)

So, I do less volume. I am eventually getting aware of the glass ceiling of training volume when you take in account work and family. I think that I feel good and fresh for workouts around 8 hours of training, 10 hours is ok. But when I push around 12ish+ I think I get too much fatigue without the reward of physiological adaptations and progress.

For example, this week I have not done two running workouts I had planned. One for schedule issue, another one because the turbo trainer in the morning was very taxing (TEae 4,1 and TEan 2,1). Of course I can find the discipline to drag myself out to do the second workout of the day but I think it’s not going to make good adaptations. Now, I see more and more « Productive » and « Maintaining » status on my Garmin and I favor this to « Unproductive ». (More on training status here). I also monitor the recovery time on my watch face to encourage my « Grandpa from Corsica behaviour » (personal strategy to favor naps, walking slow and not getting in a rush)With this kind of form, I thought that it was time to add a bit of  high intensity training. I did it on the side of caution but I found some joy in it and I was rewarded with good numbers 😉 Even Barbie enjoyed it !

On another cool advantage of this is that I merely get more fun when I bang a workout. Fresher legs, better mood ! I also expect to get rid of some chronic running niggles. There is no point in logging many running kilometers now, I want to take advantage of the COVID-19 year to take it easy on the running side and this year is gonna be the second smallest year in terms of running mileage I think.

In the end, this year is still on its way to becoming the biggest year in terms of training volume, but I understand that this is not a recipe for success for me.

Going forward is a process where you engage your gravity point forward. You take the risk of falling, you get an unbalanced position during a fraction of the time, to find a new balance.


course à pied matériel sport triathlon vélo

Entrainement guidé par Garmin, dernière MAJ Fenix 6


petit billet rapide.

Je suis intrigué par les dernières mises à jour (12.2) des appareils Garmin qui proposent un « entrainement du jour ».

Je n’ai pas fait les exos proposés puisque je suis dans ma phase « tout pour la zone 2 » mais j’ai trouvé l’algorithme intéressant dans le sens où 1) il était très prudent me recommandant souvent le repos 2) lorsqu’un exercice était proposé c’était assez simple et classique ce qui a tendance à me rassurer !

Ensuite, lorsque je fais mes propres exos, j’affiche le Training Effect sur la montre. Comme je fais de l’endurance, il n’y a que le Training Aerobic Effect qui grimpe. Sur un exo 2×30 min en zone 2, le TE monte rapidement pendant les 30 premières minutes puis se tasse. Un peu comme « l’hystérésis » de la courbe de dissociation de l’oxygène de l’hémoglobine. Ainsi, si je me fixais comme objectif d’atteindre 2 pour un exercice cool et 3 pour un exercice sérieux, les séances seraient beaucoup plus courtes et peut-être que je récupèrerais mieux. D’ailleurs j’aimerais bien avoir la possibilité d’afficher la courbe de croissance du TE dans les apps d’analyse.

Voilà voilà… sachant que « trop en faire » est le piège numéro 1 dans lequel je tombe comme beaucoup d’amoureux des sports d’endurance je me dis que suivre un peu plus les recommandations de la montre est peut-être un bon choix vu les progrès de l’algo.

Bon dimanche !


L’iPhone 11 Pro, un an après

La sortie de l’iPhone 12 me fait réfléchir à l’achat de mon iPhone 11 Pro l’année dernière. Quel recul sur la photographie informatisée et la vente de mon boitier réflex ?