I'm a pretty fit 54-yr-old and have been running all my adult life. I have a resting pulse of around 44bpm. I ran a 10K race this morning, feeling like I really struggled but still did a middle-of-the-pack time of 56:44. I felt exhausted after and am still feeling very tired.
When I looked at my stats, the second half of the race my pulse seemed to go through the roof [188bpm at one point].
Should I worry, or does it just show I'm tired and need a break for a few days? I have felt a bit run down after a week's holiday where we walked miles [one day was 15M], included 2x 5K runs; followed by a 5K when we got home; gym / rowing machine and yoga sessions since then. Reading that back - maybe it's obvious and I just need to give myself [and my sore knees!] a proper rest?