why would anyone want to try such a rigorous workout? Burning 1000 calories in a single bout definitely falls into the “epic” workout category. Typical moderate to strenuous workouts burn between 400-600 calories. If someone is large-bodied, they might burn that much but it wouldn't be too pleasant
I'm no doctor but in order to burn 1000 calories, you might be attempting a bit more than you bargained for.