I recently started using a Polar A3 HRM and noticed that when I run at a moderate pace (7-8 min mile) my HR is consistently over 90% of maximum (181), however I can continue to run without tiring significantly. When I increase pace or incline from this point, I can easily reach or exceed max HR and at this point I can continue for approximately 7-9 minutes. I do cardio 6 days a week (combination or stationary bike and running or one only on lift days). Resting HR is 48 in early AM, 55 in afternoon.
Is is possible that the HRM is providing accurate readings, as I thought training near the max HR would produce significant fatigue. Also, it is much harder to reach these levels on a stationary bike (recumbant) than it is running or stair climbing, is this typical? Any thoughts?
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