I am determined to finish this program but am finding it very hard now that I have gone onto the long runs. I feel like I am constantly being overtaken. (so pleased for everyone else, don't get me wrong). A few years ago I started learning to run and had a terrible time. I got a hr monitor and found my resting pulse was 130bpm. After investigation they found I was hyperthyroid and to cut a long story short, had radiation treatment and lost 1/2 my thyroid. I am now hypothyroid. They think my metabolism was running high for a few years at least 5 that we know of.
As soon as my hr goes up my body seems to want to quit. The interval training walking and running were great now I am stuck on the distances. I checked my heart rate and it seems to go into redline (100% energy expenditure) around the 10 min mark which is just when my energy levels seemed to drop. Most of my running is in anaerobic.(over 90%)
So it seems to be that my body/brain is fighting running for distances for now. I don't know how to run slower.
I can swim 30 len in 20 min and cross train for 30 min no problem so I have a fitness level. It just running and me are having hiccups and I refuse to give up.
Any help would be appreciated.