trail run (fartlek uphill) 50:28 9.9 km (5:06 / km) +160m4:43 / km ahr:152 max:172 slept:8.0 weight:155lbs shoes: Adidas Kanadia Trail
4 loops in Forest Park - 1 was warm-up and 3 - fartlek - running hard uphill:
9:02 (), 8:35 (), 8:38 (), 8:29 (). Lower back - level 1 discomfort on R. side. Warm evening, normal for summer.