Slide 10 of 18
The goal in resistance training is to provide an optimal overload to the muscles (and enough) rest so that they can adapt and get stronger. A variety of resistance training systems have been developed. There are various theories and approaches that advocate one system over another but it is difficult to scientifically compare each of the different systems since it is difficult to remove other potential biases and to standardize the workout regimens in an equitable manner.
Individuals are encouraged to experiment with the various approaches and to even alternate the use of different systems in their training program to provide varying training stimulus. The descriptions provided in the attached file will help you make decisions about what training system is best for your needs.