Critique my start please

Hi guys. I have a few videos of some hill sprints. I really need to work on my acceleration form more. I know there’s a bunch wrong (head down, e.g) but I can’t pin point everything.

(1) http://www.youtube.com/watch?v=q_DcnmG1fHA
(2) http://www.youtube.com/watch?v=bGwJTM9fy54
(3) http://www.youtube.com/watch?v=cnHJZwC20w0
(4) http://www.youtube.com/watch?v=bGvWcSu5Yps

My brother running 100m (any critique here would be pleasant too) - I noticed he has terrible conditioning + max speed + speed endurance. His start isn’t bad.
(1) http://www.youtube.com/watch?v=V1MCzoC2W14
(2) http://www.youtube.com/watch?v=332t0HhxFME

I thought Stikki was helping you. I would have liked the help to be seen on the thread. I don’t think anyone really knows what has been recommended.

I know as much as you do, jd. There has been no exchange in private messages.

The only things I’ve recommended are what you saw posted on the first page of this thread, just basic starting stance advice.

I’m no expert reviewing videos, but here are my 2 cents.

You seem to make some weird back and forth movement in all your starts, eliminate this from your start, everything should be going forward. This is present in both your video from 4 weeks ago (where I think a few attributed it to improper starting stance) and your videos in the hills. If you do this movement in the blocks you might even get DQed. Your running stance/hip height also seems very low, although this is hard to tell since your long baggy shorts don’t really help when trying to analyze your running position, although since the low hip height is noticeable in both the video from 4 weeks ago and the latest one, I’m leaning to think it’s not an optical effect caused by your shorts. It also appears to me your quite tight/tense in your shoulders/arms when running, this is also noticeable 4 weeks ago and now too.

I thought you would expand a bit, at least that is what I thought this forum was about. Helping athletes to a better form, add the CF programming which is for sale etc.