When should you be concerned about low heart rate? 52 upon waking, still relaxed in bed. down to 46 after slow breathing. around 60 even when light walking. does go up with activity. hard to tell if average 50s is healthy or too low?

Slow rate: Young healthy and physically active people often have resting heart rates in the 50's and even 40's during sleep. It's important to know whether your rate rises appropriately during vigorous exercise. If you still have concerns consult a physician or cardiologist for examination and get a resting 12 lead EKG which will demonstrate whether you have any significant cardiac rhythm abnormalities.