How often your heart beats each minute when you're completely still.
Your resting heart rate is like a gentle whisper from your cardiovascular system. It tells us how efficiently your heart is working when you're relaxed. A lower rate usually means your heart is strong and doesn't have to work as hard to keep you thriving.
Tracking this over time is a wonderful way to see your fitness improving. As you get more active, you'll often see this number drop—a sign that your heart is becoming a high-performance engine.