Sub40 goal midlife crisis?

[Tallon]

Dear TheEd
Thank you for the motivating words.
Kind regards

day 8 L=4'00 min/km
warmup
1k time 4'00 pace 3'58 bpm 116 effort 2/5
60 sec rest
1k time 3'56 pace 3'55 bpm 161
60 sec rest
1k time 3'59 pace 3'57 bpm 165
60 sec rest
1k time 3'56 pace 3'55 bpm 166
60 sec rest
1k time 4'08 pace 4'06 bpm 167 effort 5/5
60 sec rest
1k time 3'53 pace 3'53 bpm 169 effort 5/5
60 sec rest
cooldown