What kind of HR is sustainable for 65-70 minutes in a half marathon? I have heard 88-91 percent.
Unfortunately, this is going to be difficult to gauge because my heart rate tends to drift up significantly over time. So if I averaged 84 percent for the first mile I might average 95 percent for the final mile at the same pace. Because of this, I don't plan to use the HR monitor to pace my half. I am going to go on RPE and splits. But I will wear the strap to view the data afterwards.
However, I'm curious if people have had good or bad experiences using HR to monitor effort in longer races and efforts.
Half Marathon Heart Rate
Training Advice/Discussion
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