00:01
Okay, we're talking about the
7 signs of respiratory aging.
00:04
These are the 7 that
we're going to look at.
00:07
We'll look at them
in this order.
00:09
So you can follow
right along with us.
00:11
We'll just use this as a framework
for our outline in the slides.
00:14
Okay, so the respiratory
muscles decline.
00:17
It shouldn't be a
surprise, right?
That makes sense.
00:20
But first I want
you to think about,
what are the muscles
of respiratory?
So take a minute.
00:26
See if you can predict or if
you can jot in the column.
00:30
What are the
respiratory muscles?
Okay, let's walk through it.
00:34
Now, you might be wondering
what this is up here?
Well, first of all,
we're going to start with young Jose,
because we always start with
normal before we can talk
more about the
changes or abnormal.
00:43
Now I do this with my students in a class
and I usually take a 2.0 L pop bottle,
and I put a balloon inside it.
00:51
So you see down there that's
supposed to represent a balloon.
00:53
And then across the bottom, I have a
flexible membrane that they can pull down.
00:58
Now, if you were thinking about
this as your respiratory system,
does it make sense to you
that the top if is the lungs,
what is that membrane
at the bottom?
Well think about my body,
if these are my lungs,
what is the muscle that goes
across my body this way?
Right, it's the diaphragm.
01:19
So we use this to help you understand
the negative pressure that's needed
to help your lungs expand.
01:26
So your lungs are the balloon
and the muscles along the bottom,
your diaphragm are those
that help pull down
and cause negative
pressure in your chest.
01:36
Well, that's what allows
me to take a big breath in.
01:40
So as the air comes
in, what caused that?
Right, the diaphragm is domed.
01:47
And when it flattens like that or
when it pulls down as our membrane,
that's when there's negative pressure
created and air fills the lungs.
01:56
So it's just another
way to think about it.
01:58
We build these models, we can put
directions for you in the handout,
but it helps you see that it takes
that diaphragm being able to flatten
to cause the air to rush into the
lungs or to be able to inhale.
02:12
That's why patients whose
diaphragms are paralyzed,
can't breathe on their own.
02:17
So one big muscle of the respiratory
muscles is clearly your diaphragm.
02:22
Look at young Jose, right?
Look at the difference in
his diaphragm and old Jose,
his diaphragm muscles are weaker than
than they were when he was 20 years old.
02:33
So you can tell that the work of breathing
is going to be a little bit harder for him.
02:40
So before we move on, I just want
to go over this slide one more time.
02:44
Remember,
this is an analogy for you.
02:47
This isn't exactly what
your lungs look like,
this is the analogy of using
it in a bottle with a balloon
and a piece of membrane
along the bottom.
02:55
So we'll show you more exactly
what happens to the diaphragm.
02:58
But the takeaway point here is it's that
diaphragm muscle that when it flattens
it pulls that air in by creating
negative inspiratory force.
03:09
So on the left,
you have young Jose,
on the right,
you have older Jose,
and you can see the difference
in their diaphragm muscles there.
03:19
So let's take a look at the
specific muscles of respiratory
like we just said
we're wrapping it up.
03:25
Your lungs were the
balloon in that analogy.
03:28
And that elastic membrane
represents by your diaphragm.
03:32
So take a look at that diaphragm
you'll see that it's the MVPs.
03:35
We told you it is the most
important player there.
03:38
Your diaphragm is dome-shaped
and it's what divides my
upper from my lower, right?
This is why my lungs do
not touch my intestines.
03:46
So I have a diaphragm here.
03:49
This is a main driver
of respiratory rate.
03:52
Now the ribcage muscles
also play a role.
03:56
Why would you need ribcage
muscles so you can breathe?
What I want you to do
is take a big breath.
04:03
What happens to your ribcage?
Right, it lifts up and out.
04:08
Fill up.
04:11
Yeah, so they're muscles in between your
ribcage that is what makes that movement.
04:16
So the diaphragm causes
negative pressure.
04:20
The ribcage muscles
help expand your chest,
move it up and out.
04:25
Now you also use
abdominal muscles.
04:27
We all want more of those and
who doesn't want a six pack.
04:30
Actually we all have one,
some of us just keep ours hidden.
04:34
But when we're talking about the
muscles that allow us to breathe,
you need an intact diaphragm,
you need ribcage muscles and
you need good abdominal muscles.
04:46
Now when a young
fit, healthy person.
04:49
It's easy to see how these
could be very strong.
04:51
Let's take a look at
what happens as you age.
04:54
Because when your diaphragm
relaxes, air leaves the body.
05:00
So let's take a look
at this in action.
05:03
When the diaphragm muscle
contracts, that's when it flattens.
05:07
Now remember,
that's going to cause negative pressure
and you'll see that air rushes in
to the lungs into the chest cavity.
05:15
Now when those muscles relax,
then air will leave the body.
05:19
So those three groups of
muscles, the ribcage muscles,
the abdominal muscles
and the diaphragm.
05:25
Let's go over that
when they contract,
then you take air in and your
chest wall expands when they relax.
05:33
You breathe back out again.
05:35
Now let's take a look
at Jose at age 85.
05:39
See this respiratory
muscle strength.
05:41
Remember and his endurance
has deteriorated.
05:44
Now, since these muscles,
these three groups of muscles
are not going to be as strong as
he was when he was in his 20s,
then we're going to have the
maximal ventilator capacity
is going to be decreased.
05:55
So the major change we're going to see
is that maximal ventilatory capacity
is going to be less than
when he was 20 years of age.
06:03
So point 1,
respiratory muscles decline.
06:08
And when we say muscles, that's when we
put pictures up here of someone exercising.
06:12
Because the more we exercise the
muscles, the better they will remain.
06:17
So if you want to maintain
health over your lifetime,
exercising those muscles
is the best way to do it.
06:23
So it works with our
cardiovascular system
and it also works with
our respiratory muscles.
06:28
So you want to keep
those in shape.
06:29
The more we use a diaphragm,
force yourself to do exercise that
cause you to breathe faster and harder.
06:35
That's going to keep your respiratory
system in much better shape.
06:40
And that's really what the difference
is between a very active Jose,
who can still jog and Enrique
who stopped exercising years ago.