Lactate Threshold & Onset of Blood Lactate Accumulation (OBLA)

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PATREON

[DC-ucji]

This video is amazing. Best / simplest detailed explanation out there.

[ramilurazmanov]

Oh my god, this video as a gem as the other ones on your channel, man. Thank you a lot for what you’re doing! You’ve made me understand such important things, gosh!

[kimjong-du]

You have two criteria for OBLA: Lac @ 4 mM and 85% of max heart rate. 85% of max heart rate in this plot is approx. 157 bpm (HRmax seems to be something around 187), but the heart rate at which lactate is 4 mM is approx. 180 (which is closer to 96% of HRmax), so something is not right here.

[_ktie_]

This is Brilliant! Thank you so much... this will help me with my assignment.. was really confused about the differences between lactate threshold and OBLA... have some clarity after searching for ages.

[jessethompson]

This is great, but I'd like to know how you measured LT1.
Also, LT1 at 1mmol is really low!

[xyzct]

Very clear and informative. One thing I'm now clear on is how the aerobic threshold was arrived at. I know you said it's where the graph goes from linear to exponential, but that seems rather arbitrary as it assumes there is some phase transition from linear (one process) to exponential (a new process), when in truth exponential growth through the entire domain can _look_ linear in the early phase, even though it is all the same process.

[mfarnell]

awesome, best video on it by far. I can finally understand this stuff now, many thanks!

[corwynwarwaruk]

Great info on lactate and how the mitochondria plays a role in energy during excersize.

Thanks for the great video!

[Max-rskr]

Man I would be concerned if my BPM would be 115 at rest :) Great vid!

[nathanielseltveit]

You classify the lactate threshold as 85% of max hr, but when you get better as an athlete and increase the speed at your anaerobic threshold, the body adapts to the training and use more % of your vo2max to get more efficient. So a great sign of improvement is to have a high hr at a lower lactate value, which symbolises improvement. An athlete like Jakob Ingebrigtsen or eliud kipchoge can mabye have 90-95% of max hr at anaerobic threshold.

[agnieszkajelen]

But lactate threshold is actually anaerobic threshold. OBLA occurs because of exercising above it. Isnt it?

[kwikitti]

Very well explained, the graph was particularly helpful. (I'd love to see other athletes' lactate graphs to see how they compare). Can a person's OBLA/anaerobic threshold vary significantly between tests as it is affected by many different physiologic factors? Note: You mentioned at 5:54 that you were going to post a link to a video about "augmenting" aerobic metabolism with anaerobic metabolism. I don't see the link above, can you please point me in the right direction for that video? Thank you!

[SpeedBoosted]

The graph is off: left axis should have +1. The LT1 is 2 mmol and LT2 always 4 mmol

[gengar]

Thank you for this video. What parameters have you put on the graph to determine the 2 intersection points, or is this just by gestimation visually?

[isiahagonzales]

So to put this video and last video together, increases in lactate causes the body to react by increasing H ions, (h ions also produced by hydrolysis of atp) so if we can increase an athletes lactate threshold, we can increase their clearance rate, therefor, more clearance equals less h ions in the blood ?

[adamfeerst]

It may be semantics, but your terminology is different than I’ve heard elsewhere. I’ve always known OBLA to be where lactate first starts to accumulate - LT1 or Aerobic Threshold - not LT2 or Anaerobic Threshold. Also, you mention lactate being a fuel source for the brain, for example. You fail to mention that lactate is also converted to ATP to be used in aerobic metabolism by the muscles.

[tasosmakris]

1. At no point in time can a muscle cell rely socely on oxidative ATP production... All energy systems work together. 2. After the so-called "aerobic threshold", your claim that the aerobic energy system isn't sufficient to provide "all" the energy is not true again since all energy systems work together, so if aerobic metabolism increases, so will anaerobic metabolism increase. The blood lactate concentration shows the balance between the rate of lactate appearance from muscle cells and the rate of lactate disappearance from many different types of cells. If blood lactate increases with exercise this simply states an imbalance between those two in favor of lactate appearance. Muscle cells are oxygenated enough to provide great amounts of energy even at intensities just above the so-called anaerobic threshold... There is no such thing as a turnpoint from more aerobic metabolism to more anaerobic metabolism ( only AT intensities above VO2MAX where the mitochondrial reticulum has achieved its maximal capacity and therefore anaerobic metabolism is the only way to keep ATP high). There is no such thing as anaerobic threshold. Plus lactate is produced under fully oxygenated muscle cells showing that its not a lack of oxygen that causes lactate to accumulate. Lactate dehydrogenase in muscle cells is limited by substrate, which means that only a lack of NADH and pyruvate can decrease the production of lactate. As long as glycolysis is working and NADH and pyruvate are beeing produced, no matter how much oxygen in the muscle cell, lactate will ALWAYS BE PRODUCED. THERE IS NO ANAEROBIC THRESHOLD!

[SpeedBoosted]

I think there is a mistake in the video chart - as far as i know LT1 is at the 2 mmol. On the graph it's 1 mmol which is impossible...he gets 2 mmol at 173 beats and 4 mmol at 182? Too magic to be true

[TMBLC]

Clarification question: My max HR is 176 bpm. This means my OBLA is 176 * 85% = 149.6 bpm (round down to 149). Does this mean all my threshold work needs to be below 149 bpm? Also what would my "Aerobic Threshold" look like?

[ognjenvaricak]

Hello, I was wondering, what would be considered as a subthreshold then? Thank you!