Are heart rate fluctuations while exercising a cause for concern?

Ask Dr. Rowena
[dropcap]Q:[/dropcap] I am a 75-year-old woman with a resting heart rate of about 58.  It goes up to about 100 when standing, 145 walking and if I run, up to 175.  My heart rate also changes rapidly.   Should I be concerned?[dropcap]A:[/dropcap] It sounds like you are monitoring your heart rate at home, which is great and keep it up.  Even better, it is great that you are active and exercising.  It is normal for your heart rate to increase with activity.  We suggest that you speak with your doctor about your exercise routine and whether you need to take extra precautions or modify your activity to meet your body’s needs.