Here is a video of one on my 100m runs, im the one in the white vest leading at 50m. https://www.youtube.com/watch?v=gZzWcNC5ha8
I recently posted a video of some of my block starts on here and have tried to change a few things that some guys on elite track pointed out and all in all i think my start was one of my better starts of the season, however the same cannot be said for my final 50m of the race. Im not sure if its possible for you to tell from this video, but my opinion is that its a Max Velocity issue, i dont think it would be a speed endurance problem seeing as im 400/800 guy. any thoughts you have?