[adrian_b]

Lactate accumulates in the body only during a high intensity exercise, which generates lactate faster than it can be consumed by oxidation (like a sprint for up to 400 m).

When the intensity of an exercise is low enough that you could sustain it for much more than a few minutes continuously, there should be no increased amount of lactate in the body.

[atrettel]

I want to expand a bit on your last statement. It is generally true but there is some important nuance I'd like to add. There may be some increased lactate temporarily but it will be minimal for aerobic exercise. It takes at least 2 minutes from a resting state for the body to reach VdotO2max. This means that even during aerobic exercise, you will be using at least some anaerobic energy production initially if you were not already warmed up. This is one reason why doing a warmup is a good idea.

[fasa99]

Guys, guys. It's not about exercise. Cancer makes lactate independent of exercise. Exercise, in lack of oxygen, also makes lactate.

Here's the thing with cancer (1) sometimes it actually does lack oxygen, because it grows faster than blood vessels, so may prefer lactate creation, known as "fermentation" (yes, like beer which ferments sugar to alcohol, but humans ferment sugar into lactate). So the whole body may be bedridden, not exercising, but a little part of it is not getting oxygen. (2) EVEN IF there is oxygen available to the cancer cell, they have been shown to, EVEN THOUGH there is oxygen there, they still proceed through fermentation and produce lactate. And it's not well known WHY cancer cells do this. This paper suggests that it's a chemo resistance mechanism. Other thoughts have been that it simply pushes through more physical carbon atoms which help make more cancer faster.... this concept of "why does the cancer ferment even though oxygen is readily available" is known as "The Warburg Hypothesis"

Because with oxygen 30x more ATP is produced. Why would cancer seek the vastly more inefficient energy production pathway, the insinct is that cancer would be hyperefficient at being canerous.

Dunning-Kruger energy here...

[atrettel]

Hi, I didn't comment on the cancer part. The discussion elsewhere in this thread connecting this to exercise seems specious to me. I was just trying to put in a good reminder to warm up before you exercise. I appreciate your clarification nonetheless.