This manner of cardio workout intersperses intervals of all-out exercise with recovery periods of either minimal-intensity exercise, such as strolling, or comprehensive relaxation. It's a big departure with the "regular condition" cardio that most persons do at a reasonable intensity for 30-60 minutes. AMRAP means As Many Rounds As Possible. https://jessewolf.com/torch-calories-with-these-high-intensity-fat-burning-workouts/