Three easy laps at Ben Geren. No traffic concerns, but not without incident either. Tripped on a rock during the first lap; don't know how I kept from doing a faceplant, but somehow got the right leg under me as I tumbled forward and maintained balance. Otherwise pretty much slow and steady; kept the HR in the low 130s. Got in a couple of strides at the end. My thought as I looked at the HR on the Garmin was that, if I'd run 4.6 at this pace in July, the HR would have been about 150. Tonight, it was low 50s and breezy; barely even needed a headband. Garmin says the AHR was 137, but then for much of the first mile it was counting cadence, not HR, until the electrodes got sweaty. | 