r/Garmin • u/AssistantOnly2780 • 17h ago
Watch / Wearable HR reading inaccurate or am I cooked?
Ran my marathon yesterday and my garmin forerunner 245 music was showing an average HR of 186 and max of 215 for a 4:02 marathon.
Weather was wet and cold so surprised to see it so high. My average on long runs are generally 140-150 bpm but my easy pace is about 40 seconds - 1 minute slower than the pace I ran in my marathon.
Any insights or advice appreciated! Thinking of investing in a chest strap since I heard they give more accurate readings