tag:blogger.com,1999:blog-618639792837880710.post1366481465342288244..comments2023-09-09T06:30:57.710-04:00Comments on Dedicated to the High School Athletic Trainer: Good question from Kev...Joe Przytulahttp://www.blogger.com/profile/17872659808449420318noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-618639792837880710.post-73647465075520444982010-12-18T15:35:58.295-05:002010-12-18T15:35:58.295-05:00...and with Brians take now we can understand how ......and with Brians take now we can understand how a ruuner could develop stress fractures about the pelvis.Joe Przytulahttps://www.blogger.com/profile/17872659808449420318noreply@blogger.comtag:blogger.com,1999:blog-618639792837880710.post-15164292274532002342010-12-17T15:46:44.982-05:002010-12-17T15:46:44.982-05:00First of all Joe back in the US of A on my way hom...First of all Joe back in the US of A on my way home and sitting in Newark International waiting for a connecting....the place is a zoo!<br />Excuse me but I'm going to entertain the hypothesis in the referenced study for a moment that isolated exercise of select muscles can improve a task that requires multiple muscles to interact with each other in order to perform, in this case, walking efficiently. Just when its put that way it sounds ridiculous...Anyway, Trendelenberg gait is actually due to dysfunction of two muscles (Glute Medius and Glute Minimus). These muscles not only abduct the femur in an open chain (I know you're not fond of the term), controls frontal plane motion during ipsilateral WB'ing (closed chain), but we should also consider that these muscles perform external rotation (Glute Med) and internal rotation (Glute Minimus) in an open chain. We also know that the femur is reacting to events distal to it during heel strike to mid stance and finally toe off requiring it to internally rotate and then externally rotate through these kinematics stages of gait. Therefore these muscles not only must control the pelvis but also guide the femur to firstly decelerate (internally rotate) then accelerate (external rotation). Perhaps when the strength or control of these muscles is compromised they maintain it's role in keeping the femur centered and guiding it's transverse plane motion but leave the pelvic control to the multitude of other muscles that live in the neighbourhood to keep an eye on the frontal plane? <br />Look at the anatomy of these muscles. Not big cross sectional areas, not far away from the joint axis, and have small lever arms. Therefore, they cant be the main culprits...But like the interaction of the scapula to the glenohumeral joint during overhead motion sometimes when some muscles are on vacation something can get chewed up. Perhaps a lack of control of the frontal plane pelvic motion on a femur that also creates a transverse plane motion of the pelvis during late swing phase that this combination causes other structures such as the L spine to get chewed up. <br />With all that said isolation exercises wouldn't make sense any way based on what we know of the kinematics during gait....I've come full circle, that's jet lag for ya, Feliz Navidad!Brian Greenhttps://www.blogger.com/profile/05891343866423087286noreply@blogger.comtag:blogger.com,1999:blog-618639792837880710.post-54372686025998549472010-12-16T21:34:38.134-05:002010-12-16T21:34:38.134-05:00the body will choose it's own resonent frequen...the body will choose it's own resonent frequency to perform at. I think you are correct, multiple areas manifesting itself in frontal plane hip drop.Joe Przytulahttps://www.blogger.com/profile/17872659808449420318noreply@blogger.comtag:blogger.com,1999:blog-618639792837880710.post-59823312137528844162010-12-16T13:13:35.319-05:002010-12-16T13:13:35.319-05:00Is the problem that we are reducing force in these...Is the problem that we are reducing force in these situations when actually we should be producing force? Agree the system is malfunctioning, maybe multiple areas, maybe just never learned how to run? Might be compensation as well - which could explain it why it becomes more obvious when fatigued. As always Joe, you are trying to make folks think.activedchttps://www.blogger.com/profile/06194409818091447534noreply@blogger.com