An exercise stress test, also known as a heart stress test, evaluates how well your heart functions during physical activity. Your heart requires more oxygen when you work out. You might not ...

Dear Mayo Clinic: I have a treadmill stress test scheduled to look for heart disease. I know this involves exercising, and I'm worried that I'm not physically up to it. Is there another way to gather ...

Heart rate variability typically decreases during stressful situations, although the heart rate increases. Managing stress levels can mean a more variable heart rate. Exercise and relaxation ...