The run up is very important to be able to generate speed. The ideal run up is one where you start slowly and build up your speed till you reach the peak at about 3 or 4 strides from the crease and maintain this speed into the delivery stride and action.

Gradual increase in speed is important and try not to run more than what is necessary.

Saving energy is vital for the effectiveness of a fast bowler over a period of time. The best way to know what is correct for you is to go to an open field and mark a spot on a clear stretch of ground. From here close your eyes and run, gradually picking up speed and then deliver the ball. A friend can mark the spot your back foot has landed. From here walk normally to the spot you marked earlier and this will be the exact number of steps to take when you mark you run-up before bowling.

This exercise is to be done three or four times and the most smooth and efficient one must be selected. When taking the run up in a match start from the bowling crease as this is the place where your back foot has to land.