one question.

[risepmj]

psoas muscle is important part of sprint for raise leg quickly.

Your opinion,What is best exercise for psoas muscle? how to strength that?except sprint drills.

[Mark Rippetoe]

You want to isolate the psoas?

[Antigen]

Yeah, apparently it's a limiting factor for sprinting top speed. How does one train the psosas for power?

[JLascek]

This raising of the thigh, or in other words flexing the hip, is coached in conventional sprint mechanics. However, those with a much better understanding than I in this matter say that this is a useless coaching point.

Focusing on flexing the hip is wasted motion and energy, but I digress.

[risepmj]

isolate or not i want to strengthen that for sprint.

I want to strengthen functional inner muscle for sprint.

here is asafa powell's psoas muscle.(from 5:20~)

http://www.youtube.com/watch?v=B7elFWASSr0

[Mark Rippetoe]

Are you aware of the fact that this video is narrated in Japanese?

[jgrube]

Are you aware of the fact that this video is narrated in Japanese?

well.. he is from south korea

[risepmj]

Ok i was fully aware of video.

[Mark Rippetoe]

J, please explain how that explains anything. And the OP is not being helpful either. I have explained on this board for about two years that I think isolation exercises don't accomplish anything, and why I think so.

Now, is there anything else?