I did 4 miles on a gradual incline (2.5%) and tried to keep a consistent effort level. My heart rate fluctuated between 165 and 179 bpm and here are my splits: 6:56, 6:57, 7:01, 5:54. The last half a mile was a steep downhill so I sped up to keep my heart rate consistent. I have to say I'm a little disappointed in my splits on such a gradual incline. I was hoping I'd be able to sustain a 6:45 pace.
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