Answer :
Final answer:
Exercising at a vigorous to very hard intensity falls under the anaerobic threshold zone, which is above 85% of maximum heart rate and causes lactate to accumulate. Target heart rate zones are used to ensure exercise is done within a safe and effective range for cardiovascular health benefits. The cardio zone at 70-85% of max heart rates leads to more overall calories burned.
Explanation:
Exercising at a vigorous to very hard intensity where talking is limited to infrequent, short phrases typically falls under the anaerobic threshold zone, also known as the lactate threshold. This zone is characterized by a high level of exertion that can only be sustained for a short period. During this zone, you are exercising above 85% of your maximum heart rate, and the body starts to produce lactate at a faster pace than it can be cleared, making it difficult to continue for a long duration.
The term target heart rate (THR) describes heart rate zones that represent an intensity range. The low end heart rate is the minimum threshold, and the high end rate is the peak at which one should aim to reach during exercise. Monitoring the heart rate ensures exercising within a safe and effective range, which can lead to various cardiovascular health benefits including improved heart function, better circulation, and increased stamina.
While the fat-burning zone generally refers to lower intensity aerobic exercise, typically between 60 and 69% of your maximum heart rate, the cardio zone is categorized as high intensity aerobic activity with heart rates ranging roughly between 70 to 85% of your maximum heart rate. Though more total fat may be used at lower intensities, vigorous exercise can lead to more calories burned overall, which is significant for overall weight management and cardiovascular health.
