Mike Mentzer argued that bodybuilding was an anaerobic (high-intensity/brief duration) activity geared specifically toward the development of muscular strength and size, whereas aerobic activity (low-intensity/long duration) was geared specifically toward the development of endurance. Consequently, one would obtain his or her best results knowing this prior to training and then engineer their workouts according to which component they wished to achieve. Understanding the distinction in approaches will eradicate a good deal of the confusion that some seem to have regarding how to proceed with their training.