Defensive lane slides are a great way to work on the fundamental movements of on the ball defense, and also to work on conditioning. During a defensive possession, the average defender will come out of their stance multiple times. This is due to them not understanding the value of being in a stance the entire possession, but it is also because their legs are not conditioned to stay in a stance for that long.
The lane slides defensive basketball drill is going to help with both of these problems. All of the repetitions will help place value on the importance of staying in a defensive stance, and it will also give them the leg endurance to do so. Another great thing that this defensive basketball drill does is that it allows the player to work on the correct defensive slide technique. There should not be any heel clicking, crossing the feet over, etc. and this drill will help to make sure that this doesn't happen, by reinforcing good technique. This drill does not need to be done for very long, but it should be emphasized on a weekly basis during your basketball training and practices.