I am a beginner jogger/runner on a high protein diet. I am 32 years old and have a BMI of 31. I am 175cm (~5'9") tall, and weigh 96kg (211 pounds). I walked for a couple of weeks and now I can run for 2.2km at a speed of 9km/hr. I get tired at the end of my run (after 17 minutes), and my heart rate is at 180bpm. Might this 2.2km run be bad for my heart?
closed as primarily opinion-based by JohnP, Baarn, FredrikD, Freakyuser, Sarge Feb 20 at 16:20
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From my experience as a personal trainer, I would say that regardless of the 180 being accurate, if you are not feeling dizzy, nauseous, or a headache then you are not overdoing your running. Most of the overweight clients who I have trained, would usually feel dizzy and or nauseous when I pushed too hard.
The fact that you are getting tired after only 17 minutes isn't something to worry about either. It can simply mean that you are still not very conditioned, and/or it can be that you are running at a pace that is simply too fast for a long sustainable jog.
The main thing to focus on is your body's communication. The body has a way of telling you when it isn't happy and you will certainly know when that's the case. So long as you feel fine after your run and nothing more than tired then you are ok.
If I understand you correctly you are indeed feeling very exhausted at the end of your run and as we can't know how well your heart is we can't definitely say that your working out like that is not dangerous. Should you be really concered or start to feel that something wrong you should see a doctor.
FWIW: Generally speaking it's not dangerous for your heart if your work out really hard if you have a healthy heart.