Strength
You get much greater strength development in the 1 x 20 RM strength training program than in any of the common high intensity strength training programs presently used by athletes. The reason for this lies in intensity and adaptation.
The 1 x 20 strength training program has less intensity which is better suited for adaptation. In other words, the body develops strength at a faster rate, i.e. adapts to the strength training program faster than when you are on a high-intensity program. As a result, over a few weeks you will have greater strength a comparison to a high-intensity program.
In addition, because of the multitude of exercises used in the 1 x 20 strength training program, you develop more strength in all the major joints rather than only some depending upon the exercises used in the high-intensity program. In the 1 x 20 RM strength training program most exercises are single joint with only a few such as the squat, multi-joint. In this way you maximize your strength development for all of the muscles around each of the joints. In a high-intensity program most muscles get secondary development not primary as in the 1 x 20. This is another factor that plays a role in the prevention of injury for which this program is known.
In addition to greater strength there are also many other benefits to the 1 x 20 RM strength training program. It is all these other benefits that make you a better performer in your sport. Keep in mind that the 1 x 20 program utilizes 20 or more exercises in the session which in turn develops greater coordination which then enables you to execute skills more effectively.
For more information see The Revolutionary 1 x 20 RM Strength Training Program.