What is the primary focus of the "All-Out" effort during the treadmill section?

The primary focus of the "All-Out" effort during the treadmill section is to achieve maximum effort for a short duration, with the goal of significantly raising the heart rate. This approach is aligned with the high-intensity interval training (HIIT) philosophy central to Orangetheory Fitness. During the "All-Out" phase, participants are encouraged to push themselves to their limits, which not only enhances cardiovascular endurance but also stimulates the afterburn effect, known as excess post-exercise oxygen consumption (EPOC).

By engaging in this maximum effort, participants can experience improvements in aerobic and anaerobic fitness, along with greater calorie burn during and after the workout. This method contrasts sharply with maintaining a steady pace, walking slowly, or focusing on recovery, which are not conducive to achieving the high intensity that "All-Out" requires. The design of these workouts is intentionally structured to challenge the individual's limits, fostering both physical and mental resilience.