A training regimen dividing exercises into three separate days often focuses on different muscle groups each day. For instance, one might train the upper body on day one, the lower body on day two, and core and flexibility on day three. This structure allows for targeted muscle development and adequate rest between workouts.
Structured training programs offer several advantages. They can optimize muscle recovery, leading to increased strength and hypertrophy. Additionally, they provide a framework for progressive overload, systematically increasing training volume or intensity over time for continued improvement. This methodical approach to exercise evolved from earlier, less structured routines, reflecting a growing understanding of exercise physiology and its application to strength training.