Disqus - Latest Comments for davidlbh

Re: Running Patterns Change as Shoes Wear Out

davidlbh — Wed, 21 Oct 2009 09:49:17 -0000

I thought the below discussions may be interesting too.
http://well.blogs.nytimes.c...

Re: Ladies! Stronger Thighs, Lesser Knee Pain

davidlbh — Sat, 03 Oct 2009 23:30:21 -0000

Squats are better exercise than hamstring curl and leg presses in my opinion. I have seen numerous cases of injuries due to hamstring curl and leg presses. I think the weakness of the quadriceps is linked to wearing high heel.

Re: Scapula winging

davidlbh — Tue, 08 Sep 2009 00:26:29 -0000

Hi Chyetuan, i would like to comment a bit on functional anatomy. It is not about just looking at the fiber orientation and how it moves. Some muscles provides neurofeedback to allow other muscles to operate much more efficiently. Tonic muscle works more like that.
As for wearing a shirt in your example, anterior serratus is poorly activated. Anterior serratus need to be in closed kinetic chain to be efficiently activated. Example, hands on wall or floor to push to allow activation. You can try it yourself by putting a hand on ant. serratus while wearing a shirt in your example. More likely the ant. serratus is poorly activated. As for rhombiod muscle, it is not through eccentric contraction to stabilize the shoulder. You must have seen winging of scapular even with rhomboid in eccentric activation as one protracts the scapular. It is through co-activation of the rhomboid and serratus to stop the winging of scapular.
I would like to meet you someday and do an exchange if you want. Thank you for sharing your views.

Re: Scapula winging

davidlbh — Mon, 07 Sep 2009 10:29:00 -0000

Hi Chyetuan, this is indeed interesting. Years ago, when i did my first human dissection, i witnessed the continuous of the rhomboid and anterior serratus muscle fibers. They should call rhomboid-serratus muscle. The fibers intermingle and difficult to separate at the medial border of the scapular. Just imagine, rhomboid and ant. serratus are like 2 slings, both meet at medial border of scapular. When both muscles contract, bringing the medial border of the scapular closer to the ribcage, thereby reducing the winging and achieving better stabilization of the scapular.
The exercise shown in the youtube might have ant. serratus activation but have little carry over towards stabilization.
I hope this is a healthy exchange of views and ideas.

Re: Scapula winging

davidlbh — Sun, 06 Sep 2009 04:33:03 -0000

Hi Chyetuan,

Thank you for your reply. I have not done the exercise described in youtube myself and i will give it a try to feel it for myself. I believe that you are awared that ant. serratus is a tonic (stabilizing) muscle unlike biceps muscle which is a phasic (mover) muscle. Training of these 2 types of muscles should be different i presumed. Maybe i'm wrong. Some may benefits from the exercise. Thanks.

David Lee

Re: What can i do for a hamstring “pull”

davidlbh — Sat, 05 Sep 2009 22:13:16 -0000

You may want to look at this article http://www.nytimes.com/2008...

Re: Scapula winging

davidlbh — Sat, 05 Sep 2009 21:54:05 -0000

My understanding of anterior serratus is a shoulder protractor and upward rotation movement. In the video it looks like a shoulder retractor.

Re: Scapula winging

davidlbh — Fri, 04 Sep 2009 00:35:12 -0000

Do you have good results with people having weak anterior serratus doing the exercise as described in the youtube. Thank you.