Well, do this:
1- Crouch
2- Right foot raised a bit and left to the back
3- Left foot stretched widely
4- Raise your face directly in front of you
5- Sprint and make sure your back and body are so straight that they form a 90 degrees angle
6- While running, don't form a wrist with your hands, open them and stretch your fingers.
This is how a real racer runs, and works in Track & Field.
__________________________________________________
With this technique, I ran a whole court in 4.82 secs.