For today’s publication of Dear Mark, I’m rebutting a couple of questions from the comment sections of the last couple weeks. First, it’s been established that fasting and practise both cause emergence hormone. What about fasted exercise–does that have an even stronger accomplish? And what about continuing to swiftly after your fasted workout? Then, I discuss the inevitability( or not) of wear and tear on the veins from blood flow-induced shear stress. Is shear stress “bad,” or do certain factors make it worse?

Let’s dig in.

Marge asked 😛 TAGEND

So fasting promotes raise hormone levels? Interesting. So does weight lifting. I’ll bet fasted weight workouts “wouldve been” pretty powerful.

They do, and they are.

What’s even better is to work out in a fasted position and obstruct fasting after the exercising. This keeps the GH spike extending even longer. And in my “just so story” imagination–which is actually quite accurate, guessing from real world hunter-gatherers–it reflects the particular characteristics of our Paleolithic ancestors. You’d get up early to fall hunting without having devoured. You’d expend a lot of energy on the hunt. You’d determine the kill, find the food. And then you’d making it back to tent to ultimately eat. Maybe you’d pass the heart and liver all over the halo before thoughts back. And sometimes, you precisely didn’t procreate the kill. You didn’t eat at all.

Makes sense, right? Fasting, doing something physical, and continuing to rapid shouldn’t be a stupendous undertaking. It should be well within the realm of possible for the average person.

Now, I wouldn’t do this all the time. There is such a thing as too much of a good thing. A hormetic stressor can become a plain old-fashioned stressor if it’s prolonged for too long. Instead, I would hurl post-fasted-workout fasting in on an periodic basis.

Nor would I expect vast “gains” from this. Physiological growth hormone production won’t construct you immense or shredded. In information, workout-related increases in testosterone and swelling hormone don’t actually correlate with increases in hypertrophy. Instead, I’d expect more intangible benefits, things you won’t notice right away. It’s important in cognition. It helps maintain bone state, organ stockpile, and general cellular regeneration. It’s great for burning fat.

Growth hormone does nature more than help overt muscular growth.

Steve wrote 😛 TAGEND

In the linked article it says 😛 TAGEND

“Endothelial cell dysfunction is an initial step in atherosclerotic lesion organisation and is more likely to occur at arterial curves and fields that are subjected to low-grade shear stress and disrupted blood flowing( atherosclerosis prone places)( 7,8 ). These mechanical stimulus activate signaling pathways leading to a dysfunctional endothelium ordering the hell is hurdle endangered, prothrombotic, and proinflammatory.

So it seems that endothelial disfunction comes firstly, triggered by blood overflow stress. It’s common wear and tear in exposed ranges. The patched knees on jeans. Succeeding endothelial state and healing may slow-going or decrease proportion of progression or is it mainly too late for that?

I’m not a doctor. This isn’t medical advice. This is just speculation.

I find it rather hard to believe that healthy arteries are inherently fragile and prone to damage and incapable of weathering the “stress” of blood flowing through them, even at the “susceptible” curves. I find it most likely that poor health, inadequate diets, and inadequate life-styles establish us more susceptible to otherwise ordinary stresses.

Do the mechanical stimulant weaken the endothelium in people with healthful different levels of nitric oxide production? Or are we talking about people whose poverty-stricken nitric oxide status is intensifying the prejudicial blood spring patterns, leaving their endothelium vulnerable to atherosclerosis?

Think about how much situation stuffs in our answer to stimulants. If you’re shy around girlfriends, a school jig is gonna be a harrowing know-how. If you’re pleasant around daughters, a school frolic will be a great know. If you’re strong, filching a barbell will be spooky, and you may injure yourself. If you’re strong, face-lift a barbell is likely to be second nature, and you may get stronger. The baseline situation determines the quality of the response.

I’d was considered that blood flowing through your arteries should be a banality occasion. It shouldn’t has become a traumatic know. Now, maybe I’m wrong. Maybe “its by” traumatic irrespective of the baseline endothelial health and the amount of nitric oxide you display. Perhaps it’s only a matter of time. But 😛 TAGEND

We know that, as you quote, atherosclerosis tends to occur at bends and curves of the arteries–the places most likely to be subject to” distressed flow” motifs. We know that” laminar flow “– blood spurting smoothly through the artery–is protective of the endothelial wall, stimulating anti-inflammatory upshots and compiling the endothelium most resistant to injure. We know that” perturbed flow” has an defending influence on endothelial state, stimulating inflammatory impressions and yielding the endothelium more susceptible to injury. This increases atherosclerosis. The question I’m wondering is if” disrupted flow” at the curves and flexes of the arteries is inevitable or not. And if perturbed spurt is always “bad.” We know that hyperglycemia–high blood sugar–makes agitated blood spurt more damaging to arterial walls. Diabetics have higher rates of atherosclerosis because their hoisted blood sugar is working with vexed blood pour blueprints. We know that nitric oxide increases vasodilation in response to shear stress–widening the routes to alter the increased stress and relieve the damages caused. We know that people with hypertension don’t get the same vasodilatory advantages from nitric oxide. We is recognized that” functional increases” of shear stress reached via use increase nitric oxide and oxygen yield and generate autophagy( cellular cleanup) in the endothelial walls.

That sounds like there are a lot of factors that increases and abate the consequences of the shear stress on the endothelial wall. It sounds like some factors realize shear stress more devastate, and some factors make it less. There may even be ingredients, like practice, that originate shear stress healthy.

This topic is really pretty interesting to me. It deserves a deeper dive, don’t you think?

What about you, kinfolks? What’s your take on fasted exercisings and GH secretion? Ever try one?

And do you think your veins are doomed to fall apart at the seams?

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References 😛 TAGEND

Nyberg F, Hallberg M. Growth hormone and cognitive role. Nat Rev Endocrinol. 2013; 9( 6 ): 357 -6 5.

Park SK, La salle DT, Cerbie J, et alia. Elevated arterial shear rate increases indexes of endothelial cell autophagy and nitric oxide synthase activation in humen. Am J Physiol Heart Circ Physiol. 2019; 316( 1 ): H106-H112.

The post Dear Mark: Fasting, Training, and Growth Hormone; Wear and Tear on the Arteries sounded firstly on Mark’s Daily Apple.