Which of the following best defines the term 'after-burn' in Orangetheory?

The term 'after-burn' in Orangetheory refers to the period of increased calorie burn following a workout, which can last up to 36 hours post-exercise. This phenomenon occurs due to excess post-exercise oxygen consumption (EPOC), during which the body continues to utilize energy at an elevated rate as it works to return to its resting state. This includes processes like muscle repair, replenishment of oxygen stores, and the restoration of normal body temperature.

The more intense the workout, the greater the after-burn effect, as the body has to expend additional energy during the recovery phase. This is a crucial aspect of Orangetheory's high-intensity interval training (HIIT) approach, as it helps maximize calorie expenditure beyond the time spent in the gym, contributing to overall weight loss and fitness goals.

In contrast, other options do not accurately represent the concept of after-burn. One suggests an inability to burn calories, while another focuses on recovery time rather than sustained calorie burn. The last option describes reaching a plateau, which does not pertain to post-workout energy expenditure.