It is a fallacy that anaerobic training develops speed. It in fact counteracts speed. Training can be done too fast or too slow, too much or too little, at right or wrong times. Co-ordination of training is important. One development follows another.
Training needs to be systematic.
No one can determine exactly what an athlete should do in anaerobic training. The athlete should determine that in each session and not train to hypothetical figures. After three weeks of heavy overload anaerobic training, the athlete needs to decide whether to back off during the fourth week and start the shorter sharper workouts. This is to maintain the anaerobic development achieved but not sacrifise good condition at the same time.