Psoas (a hip flexor) - Evil, or just missunderstood?

K

Karky

2
In my daily googlerage I came across this:

Very interesting read on the Psoas muscle. I don't know if a lot of people here on the forum are interested in this kind of stuff, though, as it's very specific.

Take a look at this:
From dissection studies and a review of the literature, Gibbons (1999) has presented a model of psoas major.
A common model of lumbar stability shows the musculature forming a cylinder. The top of the cylinder is the
diaphragm, the bottom is the pelvic floor and the wall is formed by the segmentally attaching abdominal and
posterior spinal musculature, specifically transversus abdominus and the segmental fibers of lumbar multifidus
(Morris, 1961; Bartlink, 1957; Richardson et al, 1999a). Psoas major has intimate anatomical attachments to
the diaphragm and the pelvic floor. This unique anatomical disposition allows psoas to act as a link between
the diaphragm and the pelvic floor that may help maintain stability of the lumbar cylinder mechanism. This can
be conceptually visualized as a rod in the middle of a cylinder.
During inspiration, the diaphragm increases tension making the cylinder relatively more stable. During
expiration, the diaphragm relaxes making the cylinder relatively less stable. The anticipatory timing pattern
seen in transversus abdominus is earlier in expiration (Hodges et al, 1997), presumably to compensate for this
decrease in stability (Richardson et al, 1999a). Richardson et al (1999a) are not sure how the diaphragm will
deal with high demands of spinal stability and respiration at the same time. They feel that motor control of the
stability action may be superimposed and summated to the respiratory action of the diaphragm. This may
occur, however psoas is ideally located to assist in a stability role here. Through its segmental attachments,
axial compression and links to the diaphragm and pelvic floor, psoas can play a role in spinal stability and
should now be considered an important stabilizer of the lumbar spine.
Click to expand...

Breathing while squatting, anyone?
I wonder if this could be an argument for holding your breath during exercises that require lumbar stabilization..
 
Karky said:
In my daily googlerage I came across this:

Very interesting read on the Psoas muscle. I don't know if a lot of people here on the forum are interested in this kind of stuff, though, as it's very specific.

Take a look at this:


Breathing while squatting, anyone?
I wonder if this could be an argument for holding your breath during exercises that require lumbar stabilization..
Click to expand...

Intrathoracic pressure is awesome in my book. Whom has time for breathing if the weight is heavy enough on squats and push pressing?
 
NBS, if you're still having trouble with your ***S you should read up on the psoas ans this:


A long and underactive psoas can be a cause for anterior femoral glide. The psoas will pull the head up in the socket, preventing it from gliding forward.

I'll post this in your log aswell maybe.. to make sure you see it.
 
FYI, that's what tenderloin is: the psoas muscle :)

Not that I eat people or anything ... I'm just saying that all animals have them :p
 
YEah, I know :p that's what we call it in anatomy class :p not the psoas, just the tenderloin
 
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