Final answer:
The anaerobic zone is the heart rate zone used for vigorous intensity exercises by well-conditioned athletes.
Step-by-step explanation:
The heart rate zone that involves vigorous intensity exercises generally used for well-conditioned athletes is the Anaerobic Zone.
In this zone, the heart rate is typically around 80-90% of an individual's maximum heart rate. During anaerobic exercise, the body relies primarily on stored energy sources, such as glycogen, for fuel instead of oxygen.
Examples of exercises that fall into the anaerobic zone include sprinting, HIIT (High-Intensity Interval Training), and heavy weightlifting.
Learn more about Heart rate zones