Hi Guys,
Finally got time to just sit down and run the video back. These splits are the best I can do given my current footage and the marks that are on the track (e.g. relay marks):
9.02 90m
9.96 100m (0.94)
10.86 110m (0.9)
19.30 200m
First 100m - 9.96
Second 100m - 9.34
I think the 100m time is certainly between 9.94 and 9.98!
The other splits could be off by upto 0.02.
I’m pretty sure that Bolt ran sub10 for the first 100m though!
Let’s see what the official Biomechanics team get!
Apparently PJ get’s 9.96 as well!
Was just catching up on today’s action and amazingly the BBC quoted my splits on the air! Should they really be reading this board? 
Weird. Changing gears at the start of the straight?
Could also be the angle of the camera that I was using to get the splits. It’s hard to tell when the chest crosses the line and it’s only at 50fps. Guess what you ideally want is video from above with lines on the track.
That’s the video i have.
90m 9.08
100m 9.96 (0.88)
110m 10.86 (0.90)
Interesting. 9.08 rather than my 9.02 but the other splits are the same. I’ve got better video now so i’ll check it later.
thats .90 though
Who quoted it?
Actually, they were quoting the USATF Development splits which give Bolt at 9.96 + 9.34. But well done for having the same numbers !
CF, MJ was running 0.86/0.87 out’ve the curve in his 19.32. 40-140m section in 8.76. Bolt probably would’ve been closer to 9.00
Might have to do with the height/leg length difference and the effects of the centrifugal force.
Steve Cram
Cram said these times on bbc tv.he explained that yesterday(satyrday) he was explaining the times to fredericks and fredericks said it was rediculous and didn’t believe it was done!
frankie don’t turn out like MJ.
Oh, I was just saying how quick MJ came out of the curve. Alot of us said that the improvement in Bolt’s 200m will come from that 50-150m section, and in Beijing that looked like the section where Bolt improved most from his Athens 19.67 & London 19.76 (I went to that meet and saw it - what a performance)
No doubt it would be hard to get them long legs out of the curve when producing massive force
Running in lane 5 at 10m/s, Bolt will have to accelerate towards the centre of the circle at 2.7m/s^2 to stay in his lane.
Running in lane 5 at 11ms/, Bolt will have to accelerate towards the centre of the circle at 3.3m/s^2 to stay in his lane.
Neither number has any consideration for his forward movement, but these numbers are significant. From the limited analysis available from 10m split times, in order to simply stay in his lane at those speeds, (let alone keep his speed up), he has to apply a similar horizontal force to that force he’s applying while accelerating in a 100m race at about the 10m mark.
This horizontal force is mostly realized by leaning his body. At 10m/s he will need to lean over about 15 degrees, and at 11m/s he will need to lean over about 18 degrees.
Bolt wasn’t going 10mps though- look at PJs splits which I think are a more accurate reflection.
No, but between 10m/s & 11m/s in the latter portions of the curve I think.