In Running to the Top sprint training is described as the following.
Use about 100m with the wind, if any, and use this sequence, each one twice, after warm-up.
1. With slow forward momentum, raise the knees high and fast alternately in a running action so the quadriceps start to feel tired. Do what you feel you can; jog easily back and repeat.
2.With high knee lift, long striding action with the arms being forced through and driving hard off the back foot. Do 100m twice with good recovery interval.
3.Running tall exercise, keeping high on the toes, lifting the knees high and stretching the body upwards, trying to lift the torso from the pelvis. 100m twice with recovery. The running should not be too fast.
4.Try to combine the three exercises and run the 100m twice, as fast and relaxed as you can. After these exercises, run up to six laps, using one straight to run fast and relaxed with 300m jogging interval.
Fast relaxed striding is described as...
It is important to try to relax during races and training by running varying distance from 100m to 300m, Keeping the upper body relaxed and concentrating on running with a good technique will help you to run faster times without being basically fitter.