power running for 8k under the moon light

According to the calender, Winter has come today, does it make sense? that's why I felt colder than last night and wore long sleeve T-shirt and long tights for tight's duty. Ran for 12km, 2km warm up and 8k stamina running and 2k cool down running from my place via the track in Inokashira Park and came back to my place. Enjoyed running under the moon light, felt refleshed and my legs could move and extended ahead and ahead. Because of a break yesterday, my performance was pretty good but felt my chavy back of upper leg ache.

today's efforts:
time: 1:07:27
mil: 12k as warm up for 2k, stamina run for 8k and cool down for 2k
lap1: time4:23 avg HR: 159-82% avg Pace: 4:34/km mil: 0.97km
lap2: time4:36 avg HR: 159-82% avg Pace: 4:43/km mil: 0.97km
lap3: time4:33 avg HR: 159-82% avg Pace: 4:43/km mil: 0.97km
lap4: time4:29 avg HR: 162-84% avg Pace: 4:38/km mil: 0.96km
lap5: time4:33 avg HR: 160-82% avg Pace: 4:42/km mil: 0.97km
lap6: time4:36 avg HR: 159-82% avg Pace: 4:43/km mil: 0.97km
lap7: time4:35 avg HR: 160-82% avg Pace: 4:40/km mil: 0.98km
lap8: time4:34 avg HR: 160-82% avg Pace: 4:40/km mil: 0.98km
avg HR: 142-73%
avg Pace: 5:25/km
cal: 557kcal
beginning time: 8:42pm
location: on a track in inokashira park
weekly mileage: 12km