sub 40 or 45 min program?

[rook]

So I switched over to the sub 40min program today to do the 400m runs. Just logging my results.

I did the 5K on Saturday in 21:11. Lap times:
1:41
1:45
1:44
1:44
1:43
1:41
1:43
1:41
1:42
1:42
1:40
1:38
0:48

I did the first 400m way too fast. I was aiming for a 92-94 sec pace but it's like I forgot how fast that pace is once I started running... I rested for about 90 sec after the first 2 runs to compensate. Run times:
1:16
1:30
1:26
1:29
1:34
1:35
1:33
1:30
1:35
1:31