According to the guidelines within the Periodization Model, a client beginning a resistance training program is recommended to start in which phase?

In the context of the Periodization Model, the appropriate phase for a client starting a resistance training program is the hypertrophy/endurance phase. This phase is designed to establish a foundational level of strength and muscular endurance before progressing to more intense training.

The hypertrophy/endurance phase typically focuses on moderate to high repetitions with moderate weights, which helps in increasing muscle size and improving endurance capacity. This is particularly important for beginners, as it allows them to adapt to the demands of resistance training, develop proper form and technique, and build a solid strength base. Additionally, this phase often incorporates exercises that target multiple muscle groups, enhancing overall fitness and reducing the risk of injury.

Progressing through this phase prepares clients for subsequent phases that involve higher intensity and specific strength gains, culminating in later phases like strength/power and peaking or maintenance. Thus, starting with hypertrophy/endurance sets a safe and effective groundwork for future fitness advances.