I am not sure if I am posting this in the right forum, but hopefully I am.
I haven't done much exercise recently, but am trying to get started again, however, I find that everytime I try to do exercise the same things happens each time. I feel good while I am exercising, but when I stop I sudden feel very tired and my pulse goes up. During the time on the treadmill my pulse ranged from about 100-140 I think, I am not sure how accurate those machines are. I did a moderate amount of fast walking for about 25 minutes on a slight include. I did a cool down for about 7 minutes. and then walked around for a few minutes. I came back to my apartment which is just up the stairs from the machine, when I got upstairs I checked my pulse with another meter, it was 136. And now five hours later, even after resting, my resting heart rate is still over 90.
I have had heart checks before, the doctors tell me my heart is fine, my choestorl is in check also and I am only in my 30s.
Did I just over exert myself after not having done exercise in so long? Perhaps I should take it easy and build up to what I did today, and instead to much shorter and less intenese workouts?
Any help would be appreciated.
You had a workup done and all is well, so there is obviously nothing wrong. But what I will say is that if you have not exercised in quite some time you will become deconditioned since you aren't really using any muscles (including your heart) and this will lead to high heart rate after exercise for sure. My heart rate usually stays in the upper seventies for a while after out on a fast walk, but it comes down to the usual low sixties within in an hour.
Believe it or not, just after a week of not exercising, detraining can set in.
You may have exerted yourself a bit too much, the best thing even if you are young, is to start out with fast walking, and pace yourself - find the right speed and stay at it. If you can whistle whilst exercising, then you need to ramp it up. If you can't even talk whilst exercising, then you are pushing yourself too hard.
As a rule of thumb, aim for 20 minutes in duration at the correct pace and over time as it gets easier, just gradually crank up the intensity. Walk faster or jog, and if that is still easy, increase the duration. Take it in steps.
Best regards!