What is the normal resting heart rate range for adults?

The normal resting heart rate range for adults is recognized as 60 to 100 beats per minute (bpm). This range is established based on extensive clinical research and guidelines from cardiovascular health organizations. A resting heart rate within this range indicates a healthy level of cardiovascular function at rest, reflecting the heart's ability to pump efficiently while meeting the body's baseline metabolic demands.

Heart rates below 60 bpm, such as in options describing values like 50-70 bpm or 40-60 bpm, may suggest bradycardia, which can be a sign of underlying health issues or athletic conditioning. While athletes often have lower resting heart rates due to increased cardiovascular efficiency, the standard range considers the general adult population. Similarly, heart rates above 100 bpm at rest may indicate tachycardia and warrant further evaluation.

The 60-100 bpm range serves as a guideline for assessing heart rate during physical examinations and monitoring cardiac health, making it the correct answer in this context.