What percentage of your maximum heart rate does Zone 4 represent?

Zone 4 in the context of heart rate training typically represents the range of 84-91% of your maximum heart rate. This zone is characterized by a high intensity, where your body is working hard, and you should feel challenged but still able to maintain your form. Training within this zone enhances your anaerobic capacity and contributes to improved cardiovascular fitness.

Exercising in Zone 4 is crucial for pushing your limits, increasing stamina, and improving your performance in physical activities. It also helps in building muscle endurance, as this heart rate zone indicates that you are working at a level where your body is utilizing both aerobic and anaerobic energy systems.

While the other options represent different heart rate zones, they are not reflective of Zone 4. The lower percentages correspond to easier exertion levels where the focus is on endurance and aerobic capacity, while the higher percentage options might delve into maximal effort and anaerobic threshold, which would fall into even more intense training levels beyond Zone 4.