Anything over 9 miles or so and my chest gets a gnarly rash right in the middle of my chest where my HRM sits. I put a decent amount of body glide, and no change.
I'm using a Garmin Fenix 7, plus the chest HRM strap. I feel like wrist only wouldn't be as accurate. With that said, might not be a bad idea so scrap the chest one since I'm trying NOT to focus on HR so much and go more by effort. Not sure yet.
Have you tried switching to a wrist-worn HR monitor?
I'm using a Garmin Fenix 7, plus the chest HRM strap. I feel like wrist only wouldn't be as accurate. With that said, might not be a bad idea so scrap the chest one since I'm trying NOT to focus on HR so much and go more by effort. Not sure yet.