Is it normal if your out of shape for your heart rate to get up to around 180 really quickly? Because i took the trash can around to the back of my house, which is up a slight hill. Takes about a minute. By the time I made it up I was feeling a little winded and my heart rate was up to 180. Checked less than a minute later and my heart rate was down to 112 and about 5 minutes later I sat down and it was around 90. My resting heart rate is usually in the high 60's low 70's when I'm really tired laying in bed at night. I've had a cardiac workup, including holter and 4 ekg's, bloodtests, stuff like that.
\Thanks in advance