Today I ran my standard 16k round in 1:09 instead of 1:22. Pace was fast from the beginning.
Instead of running a 5:15min/km pace I started with 4:40. After a few km pace increased constantly and the last km were covered in 4min/km. Well, temperature was down to 18 C that might be a reason.
Tomorrow will be the famous Namban JR Yamamote run. Let's see if I can cover 38k after todays workout ;-)