Thanks everyone for your advice and for sharing your experiences. I saw my family practicioner yesterday and she said my blood pressure is great and my heart rate is fine. The nurse tested my heart rate twice during my visit and they were at 74 & 84 bpm. The doctor said it is fine for me to be at a 155 bpm heart rate when I'm doing my cardio. She said my numbers should lower once my body is more conditioned. So everything is fine and I will continue my quest to get fit and healthy!
I have also purchased a heart rate monitor and use this to monitor my heart rate. A good way to figure your target heart rate (THR) is 220- your age. This would equal 190. This is your maximum THR and should only be reached on occasion and should not be used for training purposes (in other words sustaining your heart rate at this rate for a prolonged period of time). You may look into purchasing Sally Edwards' book Heart Zones- Heart Rate Monitor Guidebook. They have it on Amazon. I usually train in the 60-70% and 70-80% THR zones. I will occasionally go to 85%, but only for a short time. This heart zone training is currently saving my life. Since I have been using this zone, I have not so much seen improvement in resting heart rate, although a little, but it has lowered my blood pressure. I have been doing this since January. Training in these zones has significantly improved my cardiovascular fitness. I spend most of the training time in the 70-80% range and on an off day stay in the 60-70% range, depending on how I feel and my BP. I'm new to this concept. Since you are just starting out, may want to stay in lower ranges and build up to higher ranges. You need to go by how you feel. These examples are just me. This book has good information. Please take a look at Heart Zone training before you burn yourself out. Hope this helps.
A normal resting heart rate is said to be 60-100, so 84 is fine. When I was on the treadmill for a stress test, I was told the quick jump in my HR was probably due to deconditioning : ( You may notice that as your exercise routine becomes more steady, your HR may not jump up as quickly. As for the 180bpm, I'll bet that would be pretty tough to sustain. I think what I remember hearing is your target high rate should be 220 minus your age, so you may be right close to target....
Not sure about how the thyroid plays into the HR, but I've read where a lot of people find a correlation between thyroid and palpitations...
I had a stress test done a few months back and my heart rate got up to 180 after jogging for a couple minutes. I do have tachycardia but usually just brief episodes. It definaltly could be partly to blame on your thyroid. I had to have my thyroid removed some years back and I know if you too much thyroid hormone it can cause tachycardia.
But I think you should not worry, once you get back into exercise it should get better. I have not cardio in months due to my SVT so I am sure I will be in bad shape when I start back after my ablation next week...good luck
your resting heart rate sounds completely normal.i am guessing the high rate when working out is due to the fact that youve recently taken exercise up and you need to build your fitness up?i would imagine your pulse will be faster the more out of shape you are?certainly for myself that seems to be the case anyway.i dont know about the thyroid thing though.