ACE Health Coach Certification Practice Test

During which phase of cardiorespiratory training should upper zone 2 intervals be introduced?

1. phase 1

2. phase 2

3. phase 3

4. phase 4

The correct answer is: phase 2

Introducing upper zone 2 intervals during the second phase of cardiorespiratory training is aligned with the goals of that phase, which focuses on improving aerobic capacity and cardiovascular endurance. In phase 2, the objective is to enhance the client's ability to perform at higher intensities while maintaining a steady state of effort. This phase encourages a progression from the foundational work established in phase 1, where clients generally work in lower zones to build a base level of fitness. By incorporating upper zone 2 intervals, the training becomes more challenging, pushing the client to adapt to increased demands. This strategy allows health coaches to optimize endurance while preparing clients for more complex and varied training regimens encountered in phase 3, where the focus shifts further towards performance and higher-intensity interval training. This phase also helps clients become accustomed to the physiological changes that accompany higher-intensity work, such as improved heart rate response, increased aerobic power, and enhanced efficiency in utilizing oxygen during exercise. Therefore, the introduction of upper zone 2 intervals at this stage is a critical component of a progressive training strategy that prepares clients for more advanced conditioning.