Daniel Sturridge said this of his injury history back in 2014 "“Maybe it’s my body type, maybe it’s hereditary. Both my uncles had injuries, and my dad had them as well. Maybe it’s the Caribbean vibes, maybe I have speed but maybe it makes you more vulnerable because of the fast twitch muscles and the speed in which you’re moving." So it turns out, if he does have a higher % of fast twitch fibres, he maybe correct. Just reading Prof Wim's paper on it
Great stuff! I would love an at home muscle fiber % test. It would be useful for seeing training effects. The electrical induced twitch measurement and carnosine measurement and the 30s sprint with lactate measurement sound promising.
As an aside there was a study that looked at muscle fiber type in chronic fatigue syndrome patients. Quote: "The results showed that fibre-type proportion was significantly altered in CSF samples, which showed a shift from the slow- to the fast-twitch phenotype". From: Functional characterization of muscle fibres from patients with chronic fatigue syndrome: case-control study (2009) T Pietrangelo 1, L Toniolo, A Paoli, S Fulle, C Puglielli, G Fanò, C Reggiani Int J Immunopathol Pharmacol . 2009 Apr-Jun;22(2):427-36.
Great episode! It seems a bit absolute to say that slow twitch fibers don't fatigue and fast twitch fibers can't burn fat, but that's interesting if the differences are so strong to say that in certain contexts.
Thanks for the great podcast as always. I'm curious about the comment on fat versus carb oxidation in Type II fibers, I would have thought that at low % of VO2 Type II fibers would use a lot of fat just like Type I. Does the size principle play a role here? I.e. are Type II fibers usually in the bigger motor units so that you are mostly using them when at low intensity (and hence you might only use Type II fibers approaching higher intensities), or are the Type I and Type II fibers spread more equally between motor units of different sizes?
Lower threshold fibers while recruited first to higher threshold fibers doesn't mean the lower threshold fibers are not activated when higher threshold fibers are recruited. I.e. fat oxidation is highest at lower thresholds when low threshold fibers are primarily recruited but type IIa fibers also have a decent oxidation capacity. Type IIx have a significantly lower capacity and therefore less desirable
VERY interesing, has listen few times. On additional note: Andy Galpin's lab did muscle biopsies on high level weightlifers, his finding was that overall they displayed IIA-fiber dominance with no IIXs, but superheavyweights had some amount of IIx-fibers. These are usually obese individuals because their weightclass doesn't have upper limit so in order to get more muscle they can gain more fat. Lower weightclasses are limited by upper weight limit. Training regime presumably is the same for everyone. Andy Galpin wasn't able to explain why this was. Does it have something to do with high bodyfat-%? Or something else? They are highly trained athletes after all. Sample size might be an issue however, i don't know how many superheavyweights they did test.
That study didn't measure body fat or specifics of their training that may explain the expression of the IIa/IIx fibers in the super heavyweight lifters. As a result no direct conclusions could be drawn. However future studies are urged to include single fiber characterization and body mass measures as well as body mass distribution (fat mass specifically).
@@n827That's great to hear! As of late i've come to think that maybe higher bodyweight causes more sedentary lifestyle as compared to lighter weightclasses where you might even want to move bit more to be able to eat more. But again would love to hear more from this in the future.
Europeans did not have their origin in Africa but in Northern Siberia from where most Europeans arrived in wave after wave of migrations by herders rather than hunter gatherers much like the current people of Mongolia. That is why we have white skins and blue/green eyes due to the lack of exposure to sunlight and why we are mainly carnivores who do not have carnivore teeth since we learned to cut up and cook our prey. Slow twitch muscles matched the herder lifestyle and the animals provided the fat. Africans who chased down animals have different bone structure in the calf to foot ratio which is why Ethiopians and Kenyans win the Gold medals at the Olympics in the marathon. It is likely that some African tribes like the Masai have a different muscle fibre ratio to Europeans judging by how high they can jump and for how long.
Mr .drave did such a amazing job ...so greatful to heard this podcast ...hats off sir
Thanks for another eye-opener!
Damn though, I always take antihistamines in the peak training season 😩
Great video! Is there the link or reference for the wingate test to identify fiber types?
Thanks
Daniel Sturridge said this of his injury history back in 2014 "“Maybe it’s my body type, maybe it’s hereditary. Both my uncles had injuries, and my dad had them as well. Maybe it’s the Caribbean vibes, maybe I have speed but maybe it makes you more vulnerable because of the fast twitch muscles and the speed in which you’re moving." So it turns out, if he does have a higher % of fast twitch fibres, he maybe correct. Just reading Prof Wim's paper on it
Excellent podcast!
Great stuff! I would love an at home muscle fiber % test. It would be useful for seeing training effects. The electrical induced twitch measurement and carnosine measurement and the 30s sprint with lactate measurement sound promising.
As an aside there was a study that looked at muscle fiber type in chronic fatigue syndrome patients. Quote: "The results showed that fibre-type proportion was significantly altered in CSF samples, which showed a shift from the slow- to the fast-twitch phenotype". From: Functional characterization of muscle fibres from patients with chronic fatigue syndrome: case-control study (2009) T Pietrangelo 1, L Toniolo, A Paoli, S Fulle, C Puglielli, G Fanò, C Reggiani Int J Immunopathol Pharmacol
. 2009 Apr-Jun;22(2):427-36.
Interesting. So type 1 to type 2A I assume. I wonder how much. Seems unusual to be more than 15% or so Wim was implying. Thank you.
Great episode! It seems a bit absolute to say that slow twitch fibers don't fatigue and fast twitch fibers can't burn fat, but that's interesting if the differences are so strong to say that in certain contexts.
I was surprised by the info about 2x being lost. What about the study doing a biopsy on Colin Jackson which found he had 25% 2x?
ok, just go up to the mention of this study. So that study is an aberration.
Thanks for the great podcast as always. I'm curious about the comment on fat versus carb oxidation in Type II fibers, I would have thought that at low % of VO2 Type II fibers would use a lot of fat just like Type I. Does the size principle play a role here? I.e. are Type II fibers usually in the bigger motor units so that you are mostly using them when at low intensity (and hence you might only use Type II fibers approaching higher intensities), or are the Type I and Type II fibers spread more equally between motor units of different sizes?
Lower threshold fibers while recruited first to higher threshold fibers doesn't mean the lower threshold fibers are not activated when higher threshold fibers are recruited. I.e. fat oxidation is highest at lower thresholds when low threshold fibers are primarily recruited but type IIa fibers also have a decent oxidation capacity. Type IIx have a significantly lower capacity and therefore less desirable
This is interesting but useful for anything other that sports might be a stretch.. Good luck.
VERY interesing, has listen few times.
On additional note: Andy Galpin's lab did muscle biopsies on high level weightlifers, his finding was that overall they displayed IIA-fiber dominance with no IIXs, but superheavyweights had some amount of IIx-fibers. These are usually obese individuals because their weightclass doesn't have upper limit so in order to get more muscle they can gain more fat. Lower weightclasses are limited by upper weight limit. Training regime presumably is the same for everyone.
Andy Galpin wasn't able to explain why this was. Does it have something to do with high bodyfat-%? Or something else? They are highly trained athletes after all. Sample size might be an issue however, i don't know how many superheavyweights they did test.
That study didn't measure body fat or specifics of their training that may explain the expression of the IIa/IIx fibers in the super heavyweight lifters. As a result no direct conclusions could be drawn. However future studies are urged to include single fiber characterization and body mass measures as well as body mass distribution (fat mass specifically).
@@n827That's great to hear! As of late i've come to think that maybe higher bodyweight causes more sedentary lifestyle as compared to lighter weightclasses where you might even want to move bit more to be able to eat more.
But again would love to hear more from this in the future.
Europeans did not have their origin in Africa but in Northern Siberia from where most Europeans arrived in wave after wave of migrations by herders rather than hunter gatherers much like the current people of Mongolia. That is why we have white skins and blue/green eyes due to the lack of exposure to sunlight and why we are mainly carnivores who do not have carnivore teeth since we learned to cut up and cook our prey. Slow twitch muscles matched the herder lifestyle and the animals provided the fat. Africans who chased down animals have different bone structure in the calf to foot ratio which is why Ethiopians and Kenyans win the Gold medals at the Olympics in the marathon. It is likely that some African tribes like the Masai have a different muscle fibre ratio to Europeans judging by how high they can jump and for how long.