As I think I may already have mentioned (!!!), I did my first ever 10k run yesterday, and it was hard! I know there are many reasons some runs are like that, so wasn't too worried.
When I checked my stats afterwards I noticed that my heart rate was at least 15 bpm higher than it usually is, for the whole run (glad I didn't check whilst I was running - it might have put me off). But I'd made it home and was still alive, so again, not too worried.
Then just before I went to bed I remembered that I'd had a flu jab two days before my run. I've had no side effects from it so had forgotten all about it. But now I'm wondering if my body was so busy creating antibodies it had to work super hard to keep me running.
Any thoughts anyone?
And if that's the case, thought this might be useful for others to know 😊