What is a lactate shuttle?

800 dude wrote:

taskmaster wrote:

Try again.

G. Ahlborg et al. wrote:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC423452/

These coincident but discordant processes in the leg and arm during recovery suggest the occurrence of a redistribution of muscle glycogen from previously resting (leg) muscle to previously exercising (arm) muscle.

Try again, you're missing the obvious. Remember, we're talking about running fast here, not standing or sitting resting recovery.

Fast twitch fibres are producing lactate and both using and exporting it to other muscles fibres via the blood stream.

taskmaster. wrote:

800 dude wrote:

Try again, you're missing the obvious. Remember, we're talking about running fast here, not standing or sitting resting recovery.

Fast twitch fibres are producing lactate and both using and exporting it to other muscles fibres via the blood stream.

Why post cryptic rebuttals, when it is easier just to explain or at least point the way?

adductor_injured wrote:

taskmaster. wrote:

Try again, you're missing the obvious. Remember, we're talking about running fast here, not standing or sitting resting recovery.

Fast twitch fibres are producing lactate and both using and exporting it to other muscles fibres via the blood stream.

Why post cryptic rebuttals, when it is easier just to explain or at least point the way?

It's not easy. Look how the OP ignores the many non metabolic factors. Look how long it took for the message to get out that lactate is an essential fuel not a waste product.

It was almost 100 years ago that A.V. Hill calculated the calorific value of lactate. This has only recently become accepted by the top scholars.

Lets talk about your question.

You are searching for an ON interval duration and pace and Float interval duration and pace between the ON intervals.

Lactate appearance is closely related to %VO2max. As higher the pace as higher the lactate appearance is. Lactate appearance is not different between trained and untrained athletes.

But we train lactate removal.

So i would say for the ON interval 200-400m @5k to vVo2mx pace.

For the float interval, a longer time than ON interval @LT-10% (around marathon pace).

I was so inspired by this 200+200 ON/OFF concept so I tried it modified.

I have a grass stretch that took 33s on avg as the ON. I needed to turn twice within the OFF-time and did not hit 43, but rather 50 on avg, but the turning takes time so it was maybe eq. to 46. I did 2x10x33/46. Anyway, all running felt relatively comfortable, in the legs, but I was breathing like a whale. Steady effort and splits all the way. No feeling of lactate, but hard enough effort.

I should try it again to see if it feels better or the OFFs can go slightly faster. If that is the case, it clearly had an effect.

What I liked was all the quality fast running, still not killing me and knowing it trained the lactate redistribution well.

Jon Arne Glomsrud wrote:

No feeling of lactate

You can't feel lactate.

lexel wrote:

Lactate appearance is closely related to %VO2max.

No, it's not. Study Lactate metabolism for a few years before you start trying to explain it.

pointer outer guy wrote:

You can't feel lactate.

And that was the main takeaway out of my workout report?

Jon Arne Glomsrud wrote:

I was so inspired by this 200+200 ON/OFF concept so I tried it modified.

I have a grass stretch that took 33s on avg as the ON. I needed to turn twice within the OFF-time and did not hit 43, but rather 50 on avg, but the turning takes time so it was maybe eq. to 46. I did 2x10x33/46. Anyway, all running felt relatively comfortable, in the legs, but I was breathing like a whale. Steady effort and splits all the way. No feeling of lactate, but hard enough effort.

I should try it again to see if it feels better or the OFFs can go slightly faster. If that is the case, it clearly had an effect.

What I liked was all the quality fast running, still not killing me and knowing it trained the lactate redistribution well.

I did the same workout again. This time it was a tiny bit easier or it felt easier, and I ran 3% faster overall (both for the ONs and the OFFs). Did 2x10 and not reps until I cannot hit splits. A little higher HR, but that can vary anyway and of course 3% is nothing more than a good or bad day. But I kindof think I improved. Yet again not hard on the legs cause 32s on and 48s off (I need to make 2x180 deg turns) is short ON and quite a long OFF to recover. But again the effort and probably the anaerobic work is pretty high demanding the breath to increase much more than what the feel in the legs tell me.

A lactate shuttle is an airport shuttle specifically designed for breastfeeding mothers.

randomist wrote:

A lactate shuttle is an airport shuttle specifically designed for breastfeeding mothers.

lactate airlines ?

Jon Arne Glomsrud wrote:

randomist wrote:

A lactate shuttle is an airport shuttle specifically designed for breastfeeding mothers.

lactate airlines ?

Yes, travel free with Lactate Air, where it’s milk and honey, no money.

Other airlines bilk, Lactate flights milk.

Jon Arne Glomsrud wrote:

pointer outer guy wrote:

You can't feel lactate.

And that was the main takeaway out of my workout report?

No, my main takeaway is that you should post less and study more.

It's not easy. Look how the OP ignores the many non metabolic factors. Look how long it took for the message to get out that lactate is an essential fuel not a waste product.

It was almost 100 years ago that A.V. Hill calculated the calorific value of lactate. This has only recently become accepted by the top scholars.

But yet "lactic acid" is still a term that many people throw around these days, despite having known for a while that we do not produce that molecule. On top of that, the thought that "lactic acid" causes muscle soreness. I'd say that the fact that everyone on this thread is saying lactate, and not lactic acid , is a little victory.