In 2008, Dierks et al showed that
runners who suffered patellofemoral pain (PFP) displayed weaker hip abductor
muscles and experienced greater hip adduction moments during running than those
who did not. Ironically, also in 2008, Willson et al showed
these same mechanics and associated weaknesses were also present in female
athletes who presented with PFP in a single leg jump. Souza
et al took it one step further in 2009 to show those with PFP had decreased
EMG activity of the gluteus medius which may have led to the increased internal
rotation and hip adduction that was observed.
In a literature review published in 2004 by Bolgla et al, proximal hip
weakness could also result in increased pronation and decreased force
attenuation at the foot leading to plantar fasciitis. In a comprehensive literature review in 2012,
Chutter
et al found strong supporting evidence of proximal hip weakness leading to
knee and foot injuries. All this said,
all the studies would indicate that lower limb problems (knee or foot) could be
the combination of proximal (hip) or distal (foot/ankle) weakness or one or the
other in isolation.
So, how do we assess
this outside of a running assessment? If
we know these mechanics are in fact contributing to injury and decreased
performance, is there a way to assess outside of running? The biggest and most obvious question is, if
assessed with a series of isolated movements in a closed kinetic chain, do
these have carry over to what you would see in running? Is there a correlation? The easiest and most obvious answer is
derived from the research. All of the aforementioned
studies in each of these articles have started to look at the mechanics in
running and then found that they correlate with what they see in the lab with
isolated movements. This would lead us
to believe then that if these same movements used in these studies are done in
the clinic then what you see there should also correlate to what you see with
running.
That is the premise of
the Dynamic Movement
Assessment™ or DMA™. The DMA™ is simply a battery of tests
that have individually been taken from the research to aid in quantifying the
movements associated with these injuries and aid in identifying the “root cause”. The following video is a perfect example of what
an assessment in a closed kinetic chain can tell you. This is a Olympic track athlete
(1500 m) who’s coaches tell us they have had difficulty breaking through a
given time barrier. They see when she is
running that her mechanics are bad and have been attempting to improve with
training. She also complains of knee
pain that progressively gets worse during the season and which has progressed
to include low back (SI joint pain). After
performing this test in conjunction with the battery of DMA™ tests, we were able
to identify the root cause. For her and
her coaches, this has meant decreased knee and SI pain and improved sprint
speed and decrease 1500 m times.
After assessing 1000s
of athletes’ movements, there are some common themes that can be identified. As such, there are some exercises that most athletes
will benefit from and which work on a core of mobility and neuromuscular
retraining. The easiest to implement
into any training program is the dynamic stretches. These are typically used as a neuromuscular
setting and mobility exercise that is performed prior to training. The term stretches often leads people to the
misconception that these will be easy.
However, if performed with proper technique, these will work on
mobility, strength, endurance and proprioception. The key is proper form. To help with proper form, we are including
instructional videos of each of the exercises where we will walk through the
exercise as well as what to look for and what to avoid.
This first of these videos is the Dynamic Lunge Stretch. This is a great stretch for overall mobility of the hips and key for proprioception of the entire lower kinetic chain. Improvement here will aid with mobility but also aid in improving proprioception and control of the entire lower kinetic chain. The key with this movement is ensuring you are doing it correctly. If this is performed incorrectly with improper technique, this will simply strengthen your poor movements and not aid in decreasing injury rates or improve performance. This video is 2 minutes in length and with a lot of instruction on technique.
The second video is theDynamic Sumo Stretch.This is a great stretch for overall mobility of the hips and hamstring flexibility. This is also a key movement to work on mobility and stability of the lower lumbar spine. The key with this movement is ensuring you are doing it correctly.If this is performed incorrectly with improper technique, this will simply strengthen your poor movements and not aid in decreasing injury rates or improve performance.This video is also 2 minutes in length and with a lot of instruction on technique.
The final video is Side Stepping with a Theraband which is a very basic gluteus medius strengthening exercise. Although this is a very basic exercise and one that is used frequently, it is also one that is performed incorrectly most of the time. If performed correctly, this is a great exercise for the G.med, core and quads. If using with clients, when this is combined with perturbations to the hips, core and knees, this can become a very intensive exercise for the entire lower kinetic chain.
Hopefully you have
found this series of articles helpful and useful. Check back to our blog often as each week we
will be providing more literature reviews, exercise videos, etc.
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