Speed is the most precious of allthe biomotor qualities. It is dependent of fine motor control,coordination and explosiveness. That being said, training speed out ofsomeone is simply emphasizing the type of training that negates thosequalities. Speed and Endurance are at opposite end of the spectrum. Youcan train both, but not to the fullest extent of each at the same time.There must always be a thread of speed development work throughout aprogram in any sport. If you get too far away from speed then it ishard to get it back because it such a neural quality. The concept of?Training speed through endurance? is contradictory and basicallyfallacious. I conceptualize speed as an electric shock that excites thenervous system. For the middle distance and distance athlete and anysport that has an endurance component this is a good way to think aboutit. Use it wisely, do not overdue and remember that speed developmentmust have a foundation of good movement mechanics for optimaldevelopment.