Training towards a sub 45 minute 10K in a year

[pit75]

Today was my 5 x 1000 meter session. It was quite windy today. I started my first 1 km after warm-up and after 2 laps I noticed, that my watch is not set correctly, so I took 5 minutes break and restarted the session (without warm-up). I also got an old "Polar HR7" chest strap from a friend. Here I my results:

10 minutes warm-up // 5 x 1k with 90 sec rest // 10 minutes cool-down

1. round:
TIME // AVG PACE (min/km) // AVG HR
4:25 // 4:25 // 155
LAPS (laps are 400 + 400 +200 meters)
1:44 // 4:20 // 145
1:57 // 4:28 // 161
1:54 // 4:28 // 164

2. round:
TIME // AVG PACE (min/km) // AVG HR
4:26 // 4:26 // 159
LAPS
1:45 // 4:22 // 150
1:47 // 4:27 // 165
0:54 // 4:28 // 166

3. round:
TIME // AVG PACE (min/km) // AVG HR
4:20 // 4:20 // 162
LAPS
1:42 // 4:17 // 152
1:45 // 4:31 // 167
0:53 // 4:23 // 169

4. round:
TIME // AVG PACE (min/km) // AVG HR
4:24 // 4:24 // 161
LAPS
1:43 // 4:17 // 152
1:48 // 4:31 // 167
0:53 // 4:23 // 167

5. round:
TIME // AVG PACE (min/km) // AVG HR
4:23 // 4:23 // 162
LAPS
1:44 // 4:20 // 154
1:49 // 4:32 // 167
0:50 // 4:10 // 170

As seen from results, I am starting the first lap to strong and than slow down a little in second lap, as I don't have the feel for the pace yet.
All in all it felt good and I would estimate effort 8/10 (9/10 on last round).