Slow
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I want to start by saying that the idea of sprints came about after an increase in growth hormone was discovered after sprints. Yes, it is true that growth hormone increases after sprints, but it also goes away so quickly that the effect is 0 
(When I say quickly I mean 15 min)
Also, with each subsequent sprint, such sprints will increase growth hormone less and less, and eventually you will simply slide into a useless pit of wasting your own resources into nothing.
But today I want to conclude the article on the complete destruction of this obscurantism and the apogee of nonsense about increasing bone mass with the help of sprints.
During sprints, the body produces a high level of cortisol (the stress hormone). This occurs because such actions are biologically ingrained as a need to escape danger. Our body doesn't understand that we are running for some growth hormone, it only understands that we are running, and previously running was used only in response to danger (hunting is the same).
The increase in cortisol levels after sprints has been confirmed by multiple studies.
An increase in cortisol, in turn, has a strong impact on growth zones and lengthening. By creating conditions for depletion of growth zones and a reduction in their number, which guarantees lower growth than you would have achieved.
Cortisol suppresses SOX9 and growth plate matrix, disrupting the transition from proliferation to hypertrophy-Suppresses local IGF-1 in the growth plate, reduces the sensitivity of chondrocytes to IGF-1. The most interesting thing is that sprints don't even increase free IGF 1 (which differs from IGF-1 total, namely, free allows for increased bone growth)
Direct studies show that elevated cortisol levels slow growth in children and disrupt growth plates. By doing sprints, you're literally voluntarily destroying your own future growth in height, turning yourself into a perpetual heightcel.
In conclusion sprints ≠ increase in growth
Sorry for not adding pictures
Partially made with Artificial intelligence.
(When I say quickly I mean 15 min)
Also, with each subsequent sprint, such sprints will increase growth hormone less and less, and eventually you will simply slide into a useless pit of wasting your own resources into nothing.
But today I want to conclude the article on the complete destruction of this obscurantism and the apogee of nonsense about increasing bone mass with the help of sprints.
During sprints, the body produces a high level of cortisol (the stress hormone). This occurs because such actions are biologically ingrained as a need to escape danger. Our body doesn't understand that we are running for some growth hormone, it only understands that we are running, and previously running was used only in response to danger (hunting is the same).
The increase in cortisol levels after sprints has been confirmed by multiple studies.
An increase in cortisol, in turn, has a strong impact on growth zones and lengthening. By creating conditions for depletion of growth zones and a reduction in their number, which guarantees lower growth than you would have achieved.
Cortisol suppresses SOX9 and growth plate matrix, disrupting the transition from proliferation to hypertrophy-Suppresses local IGF-1 in the growth plate, reduces the sensitivity of chondrocytes to IGF-1. The most interesting thing is that sprints don't even increase free IGF 1 (which differs from IGF-1 total, namely, free allows for increased bone growth)
Direct studies show that elevated cortisol levels slow growth in children and disrupt growth plates. By doing sprints, you're literally voluntarily destroying your own future growth in height, turning yourself into a perpetual heightcel.
In conclusion sprints ≠ increase in growth
Sorry for not adding pictures
Partially made with Artificial intelligence.
