Just got back from the worst ever run. Although I did run for 25 minutes it was by no means consecutive. After the first 10 minuets I had to stop, my heart was pounding so fast and I couldn’t carry on. I gave myself a two minute break and carried on. Again a few minuets later I had to stop yet again. This carried on for the remainder of the run (start/stopping), I was just completely out of energy.
I would say it’s because I gave blood yesterday, but I don’t want to make any excuses for what was a poor attempt. Really disappointed.
The only good thing that came of today’s run is I did run for 25 minutes I just had to keep pausing every time I stopped and walked.