Aerobically trained athletes can have a resting heart rate as low as:

Aerobically trained athletes often exhibit a lower resting heart rate as a result of their cardiovascular efficiency and adaptations from regular endurance training. A resting heart rate range of 30-40 beats per minute (BPM) is commonly observed among elite endurance athletes, particularly those who compete in sports like long-distance running, cycling, or swimming. These athletes experience increased stroke volume (the amount of blood the heart pumps per beat) and enhanced vagal tone, which collectively contribute to a lower heart rate.

While some highly trained individuals might experience resting heart rates below 30 BPM, such occurrences are rare and typically associated with extreme cases or specialized training. Thus, a resting heart rate of 30-40 BPM represents a more standard and widely accepted range for well-trained athletes. This resting heart rate is an indicator of superior aerobic fitness and can reflect the overall health and efficiency of the cardiovascular system, making it a critical component in evaluating endurance performance.