Looking at the we'll call them the short quads if you
will even though it's not quite completely accurate, right? So we
have this guy over here on my
left your right which is the vastus intermedius.
So
It's the one that runs the most deep, right? So
it's you don't really see that one but it does affect shape
kind of like your brachialis. So
to speak is that it's gonna run underneath the other divisions of
the quads, right and no it's tendon
does not stop right there. If that slice would
be right where the patellar tendon would go but for some
reason
They cut this out in segments, but I think it actually
helps because it kind of shows how these guys
kind of bond to the tendon at slightly
different angles. So a lot
of times people look at a joint and be like, well, it's a knee joint. It just
does this it's a noble joint. It just does this here we can clearly see
that if you only contracted one of those it would have
a angular Vector on that
patellar tendon, which means that
likely in order to keep you from dislocating your kneecap. If
you're ever doing knee extension. All of these guys are going to need to function
to at least some capacity just to
actually stabilize The Joint so we could
probably make that argument for the triceps, but not to the same degree because
the triceps don't have a kneecap moving. They just have that
bony olecran that sticks out but it can't be moved but because
it can't move.
But the triceps could produce slightly
angular force people tend to
get that like how we pain in the
tendon right there, right? Because the tendon is
moving over the bone where some people get knee pain they tend
to get like more like they don't get it in the patellar tendon. They
tend to get it around in the adjacent sides because the the
patella can adapt to the lateral forces, but the
femur and the tibia do not right so
small little
Translation into some Orthopedics of this
that you can't do anything about so who cares just
do exercises properly problem solved.
Okay, they did a in OK job
at least trying to illustrate that the lower
fibers of the VMO, right? So that's the
one that is right here in your perspective,
right? These are more oblique. We call
that a pennation angle, right? So those fibers run
a little bit more lateral and what panation angle
means and this is what
we'll get into an advanced course. This is it means that the direction
of the fibers the higher the pentation eagle the more the direction
the fibers change throughout the motion. So these fibers that are running like
this right per se so they'd be
technically like this right as I bend
my knee. They orientate this way and it's extend my
knee the orientate that way so that means the intramuscular levers.
Like the line of pole kind of changes a little
bit right? It's not as a big impact to say like the moment
arm of a joint changing or something like the
peck of the lat where the fibers are literally out here, but it
does change that muscle strength curve.
So if the fibers are getting more aligned with
the movement and the stretch and then more indirect
in the short position, how would that shift the strength
curve of that muscle a little bit?
Do you think?
The bank A Little Bit Stronger in the lengthen, right which
makes sense because I mean that's where we're
disadvantaged. If I squat down I need a lot more quads to
get me out of the bottom of the squat then what I need to
do the top of the squat, right? So
whether you believe that is
just
divine intervention or thousands of years of evolution.
Either way. We've have we have a system that
is evolved to our activity demands, right? Okay, so
the
vastus medialis
Oblique, but the whole thing is the vastus medialis, but the VMO refers
to the portion of it that runs horizontal, but
the muscle itself is just the fastest medialis right has more
of a distal muscle belly and more
tenderness structure at the top right whereas
our ladder Alice is pretty much a
muscle belly that runs almost the entire length. So
you'll see that you know, they call this the teardrop and
that's because it's coming to where it's going to be more tenderness and
then the tendon is continuing to run up
there. Right and then the Lateralus it's muscle
belly runs all the way up into here. And so
it's little insertion point.
is
Just this little spot.
On that outside of the neck of the femur, right? So
this guy
Is almost like if we were to
think of what is the actual axis of that joint with the
neck right is the VMO is
maybe slightly inside that the Lateralus
is going to be a little outside that so when
we take into account that this guy
here.
Hands in the way this guy here.
Ties into this structure on the hip what would be on the outside of
the hip here?
Glutes what else?
More specifically what glutes?
Minimus medius and then what comes over the top of those?
The tfl.
Right. Okay. So and the tfl is this thing
that just like a ton of connective tissue with
a little bit of muscle belly inside of it and basically this
right here along this outer sweep
of this quad.
You will see this on everybody right? It's
just that you see that this like you'll see
this tight divot come in, right and this stuff
comes in. So this is where the lateral intramuscular
septum of the legis, right
and that anchors the tfl along
that femur and allows all of these things to
kind of share some common connection to
them. Meaning that as this quad is this
contracts and this muscle belly pulls this way.
It's just like what's going on with the tricep and
that that's actually tugging on these muscles. So there's a little bit of
a length tension relationship between my abductors
here and the lateralis.
the medial intramuscular septum
runs
oops
Right on the inside of that VMO.
Into the adductors, right? So these muscles on
the ant or the medial portions of the quads are
slightly connected to the adduction
component. So with that being said
That means just like the triceps even though
the quads all just wrap around the knee we should
be able to use different hip positions to bias
the different positions of the quads.
The problem is
with the tricep I can go out here.
I can come in here. Right and I can just move
that Vector with the quads. I can't go
over here and then do a leg press and then I can't like come
over here and then do a leg press so.
in theory
And this is kind of what we've tested with some of
the lab stuff but haven't been able to replicate it on machines is that
we can start to separate the quads but changing foot
position and stuff. There is not specific because
basically it just ends up going through the paths of
all of the different quads, so
For instance. What quad
are we missing on this section here?
Yeah. All right. So let me put him on here because he
goes over the top.
So we got this guy here.
And he actually comes in and attaches to
the pelvis, right? So he is a he has a
potential to be flexing the hip as well as extending the knee
but if we actually look at how
this would move especially when we considered that
this is laying over the top of the other quads is what
you'll notice is that to shorten that thing it actually
ends up being at a plane that is kind of
like this. So we would need to be able to actually psycho if
I want to start biasing those quads I would need to do
a leg extension.
Like this, right and then well if I wanted this guy, right then
the theory is just like okay, we would actually need to be out here
in like be able to do like a leg extension. So
if you think about it, it's like okay if we had basically
a gate motion that was working in the adductor plane
versus in the glute plane. We would have a
quad that was respectively a little bit more bias in those
planes of motion.
but
We don't have feasible exercises to do that. And
I don't think that's a limiter for you guys in terms
of training clients getting her perch fear, whatever but from
Physical Therapy realm, I think if we continue on
that research that might be something that could be really helpful in
terms of, you know, helping people that have orthopedic problems
knee pain or whatever going to those extreme
ranges, maybe beneficial from a perchery perspective.
This just not practical with the equipment we have until we
had like a leg extension machine that you can basically do it any hip
position so you can have the same Freedom that we
do with a cable for triceps. That's just
the reality so we are going to go over quads today.
But none of these exercises can we confidently
say bias One Division of the quads over
the other the only thing that we can really differentiate
is going to be well if we're in
more hip flexion or more hip extension we know where at least
train the length tension relationship of the by of
the rec Femme and probably the Lateralus
as well. Right but not to
the same degree, but it's still neurologically going
to be just like the lateral head of the tricep meaning that
it's gonna get a little bit more of a length and stimulus here and
a little bit more of a short and stimulus here, right but
it's physical length isn't going to change as much as like
the long head does as it moves through that kind
of makes sense guys.
all right, so
questions on
the quads
Okay. So now when we talked about the triceps and
we talked about good positions for loading the quads
or I'm sorry when we talked about triceps and
then we talked about loading the quads we did that right? No.
As I phased through time. Okay. No.
We talked about if we wanted to buy us a division of a muscle
that crossed Two Joints. We wanted to
make its Force at the non-moving Joint as neutral
as possible. So if
we're looking at this View
and we're looking at the axis of
the hip and where that Rec fem is coming in, right we
essentially want that tendon to
be coming close to the axis. So that means
In extension, it's going to be pretty much
lined up.
I'm going to have very little flexion Force.
but then
suede comes out here. Okay. Can we
just impale you a little bit sir?
So that there we go. All right, so we got this guy
here. So as I pull through here, you see
that that green muscle comes close to
the axis, right? So the closer it gets there the less
influence. It's going to have on the hip flexion in the more it's going
to be a dedicated knee extensor as I start
to get here. You see now we got a distance from the axis. But
then as I come back here, I'll get to a point again
where like it'll start getting close. So
if you think of if I was actually trying to get this
to be neutral it would actually be like something out
in here right to make
this essentially
Kind of a neutral so I'd be like, alright if we wanted to do a
fully short and direct Femme it would be something out
like this and if we wanted to then do a
fully lengthened Rec Femme,
then it might be something with a
little bit of external rotation.
like that