"Be fit" level 7, session 5: Long run

Training session 5: 45-min green zone

Today I went out for 55 min run. Unfortunately my RS800CX had some problems with HR reception: the number was jumping in range of 0-200. Restarted the exercise several times, problem still persisted. Finally got usable display, thought the few first minutes are still unusable. But it means that exercise in Polar watch is 10 minutes shorter. And that explains why the distance difference is so big today. But I wonder what could cause such error? Too dry skin so that contact between belt and skin was insufficient? Some static electricity which caused transmission errors? Something else? Now, when looking at older exercise data I also see some "plateaues", i.e. periods where HR remains constant. They always seem to be at the start of exercise, so they could be related to the time when body has not started to sweat enough. And all those troubles caused me to miss some pace limits for miCoach app, which is reflected in score as well. (Plus the fact that I stopped a few time to take some photos)
The wind was quite stronger today, and tail wind in first half. It seemed to help my quite a bit, so I assumed that the running index would be increased. But 49 seems quite normal for my current state... After I turned back the wind caused HR to increase so I dismissed the HR alarm.
BTW, I read that "Blue is a comfortable easy effort and Green is a medium effort." from today's session training notes. For me, my current Green is actually comfortable easy. But it means HR at range 150-155. Should I increase it so that it would became "medium"? For me 155 seems rather high for long runs...

Session	Duration plan/actual	HR avg/max	Distance Polar/GPS	Pace avg/max	Running index	Cadence avg/max	miCoach score %
5. Green 45 min	55:00/1:08:01	149/163	7.80/9.04	7:37/5:18	49	85/91	67%
4. Blue recovery	45:00/48:48	139/153	6.00/6.32	8:00/6:49	49	81/90	81%
3. Green 40 min	50:00/55:03	151/163	7.81/7.98	7:05/5:24	48	84/89	89%
2. Yellow intervals	29:00/31:28	149/171	4.52/4.68	7:05/4:28	48	81/95	55%
1. Green 40 min	50:00/59:17	145/163	8.2/8.55	7:08/5:27	49	81/90	81%

Weather was quite warm but a bit windy: temperature +11°C, moderate breeze (6 m/s: tail wind in first half of run).
Clothing: T-shirt, long sleeve shirt, track suite, ski hat. Good.

Two pictures

I thought I should share some photos of the track I'm usually running. So I stopped today few times and tried to take some photos. But I run early in the morning, today I went out about 6:15. So unfortunately it was still quite dark and I did not manage to get any good ones, my phone had troubles with focusing... And, I actually have near-zero experience with phone photography. But I still selected two better ones to share:

They are taken from about same location, but opposite directions. This sidewalk is called "Pirita promenade" and it's part of course of the "SEB Tallinn Marathon".

Happy running,
Gert