http://www.youtube.com/watch?v=mVmqA-RrX1o
http://www.youtube.com/watch?v=PFYSiiJ64uY
I haven’t done this before thought I’d give it a try…The young man has currently run between 6.88, 6.89 & 6.90 in our first 3 meets. However, last season he consistently between 6.80 & 6.83. He also has an indoor 200m pr of 21.24 (on a 300m track).
Seems to be drumming and not have a lot of ROM around the shoulders, Randy. Possibly a bit of a posterior tilt as well, not sure it is excessive though.
Thanks…by trying to improve posture and with it foot strike he’s started to limit the bkwd stroke of the arms. Very frustrating. 
I’ll try to find a clip for last year.
How is his oblique strength? Have you cued anything on the arms or just kinda letting it work itself out for now? I’ve, in the past, had the tendency to do something similar with my arms and it took me thinking to force them to stay 90 degrees and pulling the elbows down and back to get the correction (even though they don’t actually stay @ 90 degrees).
http://www.youtube.com/watch?v=uNOAd-bOHmI
This from the 2009 indoor season I believe he ran 6.83.
http://www.youtube.com/user/rgillon1#p/a/u/1/B-hlVrZjAso
This was our official season opener where I believe he ran 6.89.
We’ve played with cues that emphasize the hand and forearm…I may have to take your suggestion and work the up to the elbow 
Carmelita Jeter (RIGHT), Glasgow 60m, January 2010
TRIPLE EXTENSION AND HIGH FOOT-CARRY CYCLING OVER KNEE OF THE SUPPORT LEG
URL=http://img693.imageshack.us/i/glasgowpickering2010.jpg/]
It has been observed by one of our forum members that given how far the free knee has already advanced ahead of the vertical plane, Carmelita’s grounded ankle should already be extended. This may account for her relatively slow time. But our coach also notes she was probably tired coming into the meet after international travel from the US westcoast.
Of course there may be other issues. This is an image of a very brief moment frozen in time. She may have hit a soft patch in the track (if it was suspended on boards for example) which may have rocked her back onto her heel.
They look so happy doing exchanges!
Kelvin Hall 60m is on boards.
I think the photo is just before you’d expect ankle extension. The heel is slightly clear and on the way up. Her form looks pretty damn good to me.
Generally you can evaluate the efficiency of running (once upright) by the status of the free leg (the one not touching the ground) at the point the heel of the stance leg leaves the ground - which for the geeks among us is the point the extensor chain (HS, glutes, lats etc) begins to become inhibited by a reflex on the bottom of the foot. The further the knee is past the stance leg at this point the better because the free hip will then be moving upwards and releasing energy stored in the IT band and glutes on the stance leg. If you look at Bolt at heel up his free leg is way past his stance leg allowing him to use all that elastic energy - hence why he is so efficient and has great speed endurance (at least over the 100m).
As KK says the further the free leg is past the stance leg the less weight is on the stance leg and so it can begin to extend. However the ankle isn’t able to fully extend until it is way behind the stance knee (hip extension is first, then knee then ankle). So i agree with Charlie, i think she looks pretty good in this picture and you shouldn’t expect ankle extension just yet - more likely as her free leg reaches it’s highest point (around hip height). The issue for me with her poor performance is with her drive and transition at the moment… we’ll wait and see what she does in Germany tonight…
Did you see the race? What’s wrong with her drive and transition?
astute commentary tc.
Just to add
I think this can serve to exhibit the correct firing sequence-hip to knees and then ankles.
great post topcat, out of curiosity how would you work on correcting/improving this action in someone who isnt meeting this ‘form’ i have an athlete who appears to have a slow ‘spring back’ so inturn isnt getting the full extension…is this a mobility issue? (in general)
I agree, some times…people just aint machines lol