Each time I look at my heart rate during a run, I have another data point to reflect on, in situ and post-event. I could just wait until the end of the run, or fly blind, log it, and move on. But I don’t; I keep looking:
What do I need to know?
What am I ready to change my mind on?
Where else could I put my attention?
I rarely look anymore; I let the trails decide – less noise, more signal.