In short, for most healthy people ta heart rate of 165 while working out is perfectly fine. This line gets more complicated with health risks and age, so if you're not sure check with a doctor. read more
Man checking his heart rate while running Photo Credit: Maridav/iStock/Getty Images When you run or perform any other aerobic activity, staying in your target heart rate range can help ensure that you are working hard enough to see results, but not working so hard that you are at risk for injury or illness. read more
Important Note: Some drugs and medications affect heart rate, meaning you may have a lower maximum heart rate and target zone. If you have a heart condition or take medication, ask your healthcare provider what your heart rate should be. read more