Distance 18.35
Average pace: 4:20/km
Heart rate: 152
Weather: 19 degrees & cloudy (5:30 am)
This run was really a lot like last Wednesday. Except it was just that bit faster. Looking at last week's entry, I slowed down when I met Horst, so maybe that accounts for the overall 4 sec/km difference. Still, today just felt like a breakthrough. I ran hard, but aerobically. Sure, my legs were getting tired later into the run, sure there was some cardiac drift, and maybe there was a bit of lactic accumulation going on, but my heart rate was telling me I was in comfortable territory. And yet had I kept running for another 3 km itwould have been a 91:36 half marathon. Just an aerobic training run! Here is a breakdown:
| Lap | Distance | Pace | HeartRate |
| Home-Komazawa | 3.8 | 0:04:53 | 135 |
| 1st Uphill | 1 | 0:04:12 | 147 |
| 1st 2100-start | 0.05 | 0:04:00 | |
| 1st downhill | 1 | 0:04:00 | 144 |
| 2nd uphill | 1 | 0:04:10 | 151 |
| 2nd 2000-start | 0.15 | 0:04:00 | |
| 2nd downhill | 1 | 0:04:02 | 151 |
| 3rd uphill | 1 | 0:04:06 | 156 |
| 3rd 2000-start | 0.15 | 0:04:00 | |
| 3rd downhill | 1 | 0:04:06 | 153 |
| 4th uphill | 1 | 0:04:11 | 155 |
| 4th 2000-start | 0.15 | 0:04:07 | |
| 4th downhill | 1 | 0:04:08 | 154 |
| 5th uphill | 1 | 0:04:16 | 155 |
| 5th 2000-start | 0.15 | 0:04:13 | |
| 5th downhill | 1 | 0:04:09 | 153 |
| 5th 1000-1100 | 0.1 | 0:05:00 | |
| Komazawa-Home | 3.8 | 0:04:21 | 151 |
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