What is Zone 5 for?
What is Zone 5 for? Heart rate zone 5: 90–100% of HR Max Maximum. Heart rate zone 5 is considered your maximum effort zone, where your cardiovascular and respiratory systems are working at full capacity. Heart rate zone 5: 90–100% of HR Max Oxygen demand far exceeds supply, making it difficult to sustain zone 5 […]
What is Zone 5 for? Read Post »