I know it's normal to have a high heart rate during working out. With my wonderful anxiety now im freaking out i may overdo it. What If it gets to high? I follow a routine on Daily Burn so I have a instructor. Today was my first day back to working out since last winter, my heart feels very overworked almost on fire. I've been to a cardioligist in October and he said my heart is fine. How do I just have a good workout without worrying im gonna kills myself???