A thread on the biomechanics of a lateral lunge - and why it’s an amazing position for those with tight glutes & piriformis.

This position is know for training the frontal plane, but it’s so much more than that.

Depending on how you do it, you can improve movement mechanics..
through an understanding of the constraints you can use with the exercise.

The lateral “lunge” is honestly a hinge, and that distinction matters when appreciating the context of when we should choose it in a program.

When we hinge, the pelvic inlet (top) comes closer together
while the pelvic outlet (bottom) spreads apart.

Notice where the posterior hip musculature (glutes & that all-so- known piriformis) attach.

When we hinge, we are essentially “spreading apart” that musculature while the pelvis goes into:

-Internal Rotation
-Adduction
-Extension
If hips are tight posteriorly, usually the pelvis is in a position where it is the opposite of a hinge - the inlet is open and outlet is closed.
We can further increase the bias of expansion of that posterior hip musculature through elevating the foot (to sink deeper) and the front toes.

This ⬆️ dorsiflexion which is usually coupled with IR, ADD, EXT and also allow for ⬆️ hinging capabilities to open the pelvic outlet.
Notice how the foot we lean off of is in more of a pronated state and the side we are lunging to has ⬆️ capability for heel reference

This is similar to how gait works, therefore I like to cue it accordingly.

Feel the pronation as they push, sense the lateral border of the heel
as they sink down.

Holding a weight in the contralateral arm is also important to ⬆️ ability to sense the heel and push the hips back as the weight serves as a counterbalance to do so.

If someone has really tight hips, we can hold the bottom position isometrically for a while
to ⬆️ duration of expansion

So, if you or someone you train has tight posterior hips and/or a piriformis, this is a fantastic position.

We can also ⬆️ specificity to human movement by simply creating awareness of the foot references to also ⬆️ the biomechanical outcomes we want

• • •

Missing some Tweet in this thread? You can try to force a refresh
 

Keep Current with Conor Harris

Conor Harris Profile picture

Stay in touch and get notified when new unrolls are available from this author!

Read all threads

This Thread may be Removed Anytime!

PDF

Twitter may remove this content at anytime! Save it as PDF for later use!

Try unrolling a thread yourself!

how to unroll video
  1. Follow @ThreadReaderApp to mention us!

  2. From a Twitter thread mention us with a keyword "unroll"
@threadreaderapp unroll

Practice here first or read more on our help page!

More from @Conor_Harris_

23 Sep
A thread on how to train the Glute Max

You often hear terms like “gluteal amnesia” or “my glutes are asleep”

Nah, your positioning and exercise selection probably sucks.

Let’s dig in on how to attack the glutes.

We first should appreciate it’s mechanics to best...
train it.

It has a significant role in:
- External Rotation at the hip and femur (leg bone)
- Hip & Trunk extension
- Hip abduction
- Posterior pelvic tilt

And yet, it is hardly active at all during standing and walking (Neumann, 2010). Interesting, huh?
In order for a muscle to be properly contracted, it needs to be stretched. That is what cues contraction of muscles in the human body.

That’s partially why it doesn’t function much in walking and standing, while it does much more in running.
Read 13 tweets
16 Sep
A thread on how to train the Serratus Anterior

Many people are generally aware that the Serratus Anterior (SA) is an important player in shoulder health, but are unsure how to train it.

It has two main functions: Shoulder protraction & assisting in elevation of the arm... Image
The SA is actually a massively important player in overhead mobility.

It needs to hold and “pull” the scapula (shoulder blade) on the ribcage, or else the scapula would be very unstable & overhead mobility is limited. Image
When it can’t do it’s job (usually other factors at play here too), the scapula will be “lost” on the ribcage and won’t have adequate congruency on it.

We see this all the time with “winged out” scapulas. Image
Read 9 tweets
13 Sep
A thread on the biomechanics of the Front Rack position and how to improve your mobility for it

The Front Rack position can be really challenging for some people because it requires maintaining around 90 degrees of shoulder flexion under load (Levangie, 2010).

To improve the.. Image
mechanics of this position, let’s understand what’s happening:

Beyond around 60 degrees of shoulder flexion, the scapular external rotator muscles need to work harder to get the arm overhead due to the progressive upward rotation of the scapula (Neumann, 2016). Image
This means that the Serratus Anterior, Upper and Lower Traps all need to work together to accomplish this.

The Rhomboids, Lats and Pecs need to let go and relax.

This is often the part that is challenging for people. Image
Read 10 tweets
3 Sep
A thread on how mechanics in the foot drives action at the hips

The body is made to interact & react with the ground.

Extension at the knee and hip is cued in the lower body when the foot arch falls/pronates & the supinator muscles are stretched (Neumann, 2010). Image
As Gary Ward says, joints act & muscles react. A stretch on a muscle will trigger it to contract.

The stretch places elastic recoil on the supinator muscles which then spring the foot back into supination upon toe-off in running and gait.

This also allows for a nice reaction Image
up the chain that causes extension at the knee and hip.

However, if the foot is excessively pronated, the supinator muscles are constantly placed on a “stretched” position. This limits them from being able to sense the stretch needed to then spring the foot into supination. Image
Read 8 tweets
28 Aug
A thread on how to train the obliques

The six pack abs get all the love, but the obliques are way more responsible for movement & function.

The obliques have roles in:
✅Pelvic control
✅Trunk rotation
✅Trunk stiffness
✅Exhalation

They can be split into the internal... Image
and external obliques.

They have similar actions, but internal obliques have a larger role in breathing & the external with trunk rotation.

So given these roles, it’s important to consider the role of the muscle fiber orientation. They mainly run horizontally. This means we Image
want to train them in the frontal & transverse planes (sideways & rotationally) to recruit them for many of their functions.

I like to pair training pelvic control + exhalation because that’s what should be naturally occurring with the resting breath anyway.

To do this, I will Image
Read 9 tweets
20 Aug
A thread on how to maximize your hamstring training

The average trainee is quite quad-dominant in my experience. So let's address that by learning how to attack the hamstrings.

The hamstrings as a whole primarily at as eccentric decelerators of knee extension..
and initiate hip extension in gait. The proximal (upper) fibers of the hamstrings are more responsible for hip extension, while the distal (lower) fibers are more responsible for knee flexion and eccentrically controlling knee extension.

So we can't ignore the fact that the
the hamstrings act in a strong eccentric fashion. In sprinting, they are heavily isometric.

Research suggests (Beardsley, 2018), that each of the hamstrings displays an internal moment arm length (optimal recruitment) that peaks at a different knee joint angles.
Read 11 tweets

Did Thread Reader help you today?

Support us! We are indie developers!


This site is made by just two indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member ($3/month or $30/year) and get exclusive features!

Become Premium

Too expensive? Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal Become our Patreon

Thank you for your support!

Follow Us on Twitter!