A high resting heart rate generally indicates lower cardiovascular fitness. Individuals with higher fitness levels typically have lower resting heart rates because their hearts become more efficient in pumping blood. Regular exercise strengthens the heart muscle, improving its efficiency and reducing the heart's workload at rest. Conversely, a high resting heart rate can signify stress, fatigue, or other health issues. Therefore, monitoring resting heart rate can be a valuable indicator of overall fitness and wellness, directing individuals towards necessary lifestyle changes or further assessment.