My heart rate when I attack hills or do long intervals at threshold plus (7-8 mins) will often get up to 200 bpm which for someone who is 66 is not normal. I will feel all right in my self but know that I am working really hard.
It would eventually drop back to around 110-130 and I feel good to go again but just in the last month it is remaining at times over 140 for quite awhile.
“Getting enough iron in your diet?”
My iron levels read all right and I am vegetarian.