Related Questions

63 yo female, resting hr 45, no hi bp, very fit/bmi 22, heart rate with only moderate exercise @185 routinely, max recorded 238. What's up?

Sensitive SNS. The sympathetic nervous system releases catecholamines which can increase the heart rate. If the rate returns to low a few minutes after exercise that is not a problem. Exercise that increases hr above 120 for an hour actually decreases cardiac out put and is not healthy. Are there no symptoms when hr is so fast.? Have you had an ekg when hr is so high?

Is it possible to monitor your internal body temperature by monitoring your pulse/heart rate?

In short, no. Your body generally does an excellent job of regulating your core temperature, so it's not something you need to be concerned about. Heart rate is also highly regulated but varies much more widely for many reasons (like when we're startled) so it's not a reliable indicator of core temperature.

If somebody has high heart rate (>90 at rest) it is very easy to hit the max HR during exercise even moderate. How safe is to exercise at that level?

Slowly increase... Lack of conditioning can lead to a HR that increases rather quickly with exercise. Slowly increasing the duration & exertion with exercise - and being consistent with exercise will help lead to a lower resting HR and a slower increase. The max HR recommendations are safe; however, it isn't easy to maintain them for a length of time that would be beneficial. Build up your tolerance.

Please explain why is my heart rate is high during a moderate intensity exercise?

Increase O2 delivery. When you exercise, your body burns more oxygen, which is carried by the blood. So the heart has to pump more blood. One way to do this is to increase heart rate.