What is the normal range for an adult human heart rate in beats per minute?

The normal range for an adult human heart rate is typically between 60 to 100 beats per minute. This range is considered the standard for resting heart rates in adults, reflecting a healthy level of cardiovascular function. The heart rate can vary based on several factors, including physical fitness, emotional state, and the presence of medical conditions. A resting heart rate that falls within this range generally indicates that the heart is functioning well and can supply enough blood to meet the body's needs without overexertion.

In contrast, other ranges listed in the choices would be considered abnormal or indicative of specific conditions. A heart rate below 60 beats per minute may suggest bradycardia, which is when the heart beats too slowly. A heart rate above 100 beats per minute may point to tachycardia, which could signal underlying health issues if it occurs at rest. Therefore, the range of 60 to 100 beats per minute is recognized as the benchmark for healthy adult heart rates.