---
title: 'The Scientific Secret of Strength and Muscle Growth'
source: 'https://youtube.com/watch?v=dChhzNGHgnA'
video_id: 'dChhzNGHgnA'
date: 2026-06-30
duration_sec: 200
---

# The Scientific Secret of Strength and Muscle Growth

> Source: [The Scientific Secret of Strength and Muscle Growth](https://youtube.com/watch?v=dChhzNGHgnA)

## Summary



## Transcript

We all have a fascination with muscles and
strength - whether we want to be stronger,
feel better, or look like superman; and there
are many proposed strategies and exercise
regimens to get this done.
But what if I told you that it was out of
your control, and that your genetics may be
entirely holding you back?
Conversely, what if there was a secret out
there that could lead you to super human strength?
The truth is: your muscle size has a limit.
Sure, it may seem obvious when you hear it,
but your muscles are under the strict control
of a protein called Myostatin, which determines
exactly how large a muscle can become.
And this limit is different for everyone depending
on their myostatin levels.
As a muscle reaches this limit, myostatin
prevents any further growth.
But if the myostatin itself is limited or
absent, this muscle limit suddenly goes away.
This phenomenon was first noticed in Belgian
Blue Cattle.
These cows developed 2-3 times more muscle
mass than a normal cow, and it was later discovered
that they had a deletion of the gene GDF-8,
which just so happens to create myostatin.
As a result, without any exercise or special
diet, these cows have incredible muscle mass.
Similar cases have been documented in dogs,
mice, and even a few cases of human babies
lacking the GDF-8 gene.
These findings have helped scientists understand
why some people bulk up easily, while others
struggle to.
Lower levels of myostatin = more muscle mass.
In fact, some studies have even shown that
many champion body builders have naturally
lower levels, or even entire deletions of
the myostatin gene.
If you look at somebody like Arnold Schwarzenegger,
as a teen, he just looks naturally muscular.
As such, perhaps many champion bodybuilders
owe their success more to genetics than their
training or drug use.
Eventually, it may be possible to develop
drugs which deplete or block myostatin.
Of course, it's a double edged sword; On the
one hand, patients with muscular dystrophy,
or muscle loss from aging could regrow and
restore muscle.
On the other hand, the potential for abuse
as performance enhancers seems...inevitable.
But, the prospect of seeing a real-life human
Hulk...seems kind of cool.
Besides, should those who already have low
levels of myostatin be considered to have
an unfair advantage?
It's hard to say.
Regardless, be weary of anybody selling or
promoting this unproven and unregulated treatment.
At the end of the day, whether you have naturally
low or high myostatin levels, remember - this
is the level that is optimal for your mechanical
and metabolic efficiency.
With proper exercise and general health, you'll
reach your own unique physiological peak.
And while you may not be destined to pack
a punch like Superman, you can push your own
limits through training and hard work.
But, what if you could punch as hard as Superman?
Our friend Jake over at Vsauce3 has the answer
to this smashing superhero question, which
you definitely need to check out.
And if you want to know how much myostatin
you have...there's only one real way to find
out.
Get working.
This episode of AsapSCIENCE is supported by
23 and Me.
23 and Me is a DNA analysis service that allows
you to explore your own genes.
Whether you are interested in discovering
your global origins, or understanding your
health and your risk for disease, be sure
to check out 23andme.com/asap.
With the help of their DNA kits, connect to
your past, learn about your present health
and potentially be part of future genetic
research, all at 23andme.com/asap.
And subscribe for more weekly science videos.