Running intervals 1:05:00 [4] 12.1 km (5:22 / km) +36m 5:18 / km
ahr:145 max:178
4x1600m/2min relaxed intervals at 4:10 pace. Splits 6:40, 6:40, 6:39, 6:36. Feeling ok otherwise but back got badly jammed yesterday and prevents me from running. Amazed that I could run at all.