Our expert says:
Difficult to say, because I don't know how "high" is for you? You mention it is higher than the average 72, but I'm not sure if that's during exercise, when you're sleeping, when you're sitting down? That all obviously affects it and so you have to interpret it according to the exercise task you're doing.
I think, however, from what you've said, you've got nothing to worry about. A full cardiology check up that shows nothing is a great sign, and though it was a while back, it's a positive. The weight gain is most certainly part of the problem, and your high heart rate may well be due to that. But it's also a loss of fitness over the last few months or years, and you'll find that it does come down, not only because you're losing weight, but because you're improving your fitness.
So my advice is to continue to listen to your body, but don't become too pre-occupied with numbers and with figures like this 72 "average". You're not "average", so should your heart rate be? If you keep training, just listen to your body and train as you feel, heart rate will take care of itself.
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