Benefits in having a high blood stroke volume???

oh I thought this was about fapping

Endurance. You can tolerate more heat stress, so you can hold a good pace longer. This seems to be true even in cool weather also.

A high stroke volume means that you are pushing more blood with each beat of your heart. More blood being moved with each beat, means more oxygen being moved with each beat. More oxygen getting to your muscles with each beat means more energy being produced aerobically, and less energy being produced anaerobically, which means greater efficiency in the use of available glycogen and less buildup of the waste products that signal your brain to tell the rest of your body to slow down.

lkj wrote:

As one get more fit their resting pulse drops meaning more blood is pumped per stroke.

This is not always true.

Smoove wrote:

A high stroke volume means that you are pushing more blood with each beat of your heart. More blood being moved with each beat, means more oxygen being moved with each beat. More oxygen getting to your muscles with each beat means more energy being produced aerobically, and less energy being produced anaerobically, which means greater efficiency in the use of available glycogen and less buildup of the waste products that signal your brain to tell the rest of your body to slow down.

Ah, not smoove you're repeating a popular myth. Think about what you wrote there and why it's wrong?

I'll put you out of your misery and explain it to ya, cuz I'm really not so bad once y'all get to know me.

Smoove wrote:

A high stroke volume means that you are pushing more blood with each beat of your heart. More blood being moved with each beat, means more oxygen being moved with each beat. More oxygen getting to your muscles with each beat means more energy being produced aerobically, and less energy being produced anaerobically, which means greater efficiency in the use of available glycogen and less buildup of the waste products that signal your brain to tell the rest of your body to slow down.

A high stroke volume doesn't deliver more oxygen with each beat. I know that's what everyone says, but like a previous poster said, bro science. Oxygen transport has got to be one of the biggest areas of bad science in sport and supposedly respected exercise physiologists talk and write utter nonsense endlessly. Result... blood transfusions and EPO touted as 'performance enhancers'.

The amount of oxygen is the same, and that's part of the wonder of it all. That your body can deliver the same amount of oxygen with a high or relatively low stroke volume. The difference is the amount of water in your blood (contained in plasma) which allows you to sweat more thus improving endurance.

Everyone please just chill wid da oxygen delivery pseudoscience and learn some actual physiology for once in your life.

Smoove wrote:

A high stroke volume means that you are pushing more blood with each beat of your heart. More blood being moved with each beat, means more oxygen being moved with each beat.

At rest yes, if your resting heart rates vary a lot between maximum stroke volume and minimum. But in exercize, what is happening?

Let me try a better explanation.

Supposing your lowest blood volume and thus lowest stroke volume is 4 liters, at the end of a long run in winter. Still with the same amount of red blood cells, so it's 2 liters of RBCs and 2 liters of plasma.

And your highest blood volume running a lot in summer, which delivers your highest stroke volume is 5 liters of blood of which 2 liters are red blood cells and 3 liters are plasma.

The difference is 25% blood volume, but not 25% in max heart rate. So if your heart rate is 200 bpm in the first scenario, it won't be 160 in the second, more like 180 moving up to 190 with repeated efforts and more greater energy expenditure.

So our heart can pump more blood when it needs to, due to ventricular compliance. This raises a question about what blood volume and heart rate for each individual delivers the most oxygen?

Hi Jon! Took a long time for you to formulate a new argument that's exactly the same as the old one.

Your clumsy attempt at southern hood dialect was a bit odd but interesting as a smokescreen.

Ima give you a 2/10 on these last three posts, OK?

You will be very unhappy with my calculation of Lance Armsrong's power output on Alpe d'Huez. 6 watts per kilo not 7

I just thought you had to know though.

pariah wrote:

You will be very unhappy with my calculation of Lance Armsrong's power output on Alpe d'Huez. 6 watts per kilo not 7

I just thought you had to know though.

All I care about his how fast people get from point A to B. And I prefer if they don't use blood boosting to get there faster.

Me too. However in the real world, people believe what they have been taught. Lance had to show that he was a bada$$ and let all his rivals know he was using the same methods as them. I also think very few of his rivals bear a grudge against him.

But isn't this comparing apples and oranges to some extent? As a Florida guy who had success in some big races on pretty warm days because of increased blood plasma derived from training in the heat, I'm well aware that blood plasma increases when training in hot and humid conditions, but that heat and humidity don't increase the number of red blood cells (which is why it is not really the poor man's altitude).

But if you were to isolate variables and look at the effect of increased stroke volume in the same conditions over time, increased oxygen delivery would be the benefit. Alternatively, you could look at it in the inverse. If stroke volume remained the same, but your blood plasma to red blood cell ratio increased due to heat adaptation, you would be moving less oxygenated blood at the same heart rate.

One thing I'm sure of, the optimal number of red blood cells is the normal number your body produces and manipulation is a silly idea. And also the idea that atltitude training increases RBCs is a myth which has been debunked because any temporary increase is ofset by a period of low relatively low erythropoiesis.

Yes a high plasma volume is better for distance running because you can sweat more and thus fatigue less than you can with a lower plasma volume.

I think VO2 max is achieved with a slightly lower than maximum blood volume and a high heart rate. If your blood volume varies as in my example above then the optimal volume for maximal oxygen uptake would be somewhere between the two figures. Tests show that stroke volume is often slightly reduced in a VO2 max test due to a plasma shift. Racing in hot conditions though, the level of hydration is just as critical as the oxygen delivery.

But the most important issue is energy efficiency. Slow runners sweat more and suffer more than fast runners in a distance race.

Hmmmm, a little variety in this one. Still, absolutely nothing new from the lab of Jon Orange.

Why you so scared to post under your real name again? Do you think people are fooled into thinking some OTHER random dude on the internet knows more than all of the guys with actual degrees and lab experience?

mybad wrote:

oh I thought this was about fapping

hahahahah!!

So who are these great experts in ex phys? Certainly not Ross Tucker. He claimes Lance Armstrong's power outputs were much higher than they were. Everyone does. See a problem there? Or would you prefer me to not mention it?

pariah wrote:

So who are these great experts in ex phys? Certainly not Ross Tucker. He claimes Lance Armstrong's power outputs were much higher than they were. Everyone does. See a problem there? Or would you prefer me to not mention it?

You will find them in labs.

Armstrong's power output is irrelevant. You have no idea about half the factors in most of his rides and are just pulling numbers out of your arse to fit your theory just like everyone else is.

All that matters is that the dope made him faster. So if you think they were lower, they would have been even lower without dope.

His power outputs were in the normal range for elite cyclists. The oxygen uptake boost is a fantasy.

You will find the people in the labs make all sort of claims about V02 boosting. Can you think of any rea$on why they might do that?

pariah wrote:

His power outputs were in the normal range for elite cyclists. The oxygen uptake boost is a fantasy.

You will find the people in the labs make all sort of claims about V02 boosting. Can you think of any rea$on why they might do that?

Of course they were. And they were higher than they would have been because he doped. Is it really this hard to get?

They make those claims because they are experts in their field and study their data and peer review it.

Nobody is paying them to make up stuff.