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
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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...
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.
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.
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..
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).
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.
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).
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
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.
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.