A resting heart rate of 40–60 bpm may be normal for athletes or highly fit individuals, but for the average adult, it can be considered too low — a condition known as bradycardia. While not always dangerous, a low heart rate could lead to symptoms like dizziness, fatigue, or fainting if the heart isn’t pumping enough blood. People with this range who are not highly active may need to be evaluated for underlying conditions affecting heart function or electrical signaling. It's important to note that while this rate may indicate excellent cardiovascular fitness in some, the generally accepted normal range is 60–100 bpm. If your resting heart rate consistently falls below 60 and you're not extremely active, it’s best to speak with a healthcare professional.