Did a 2k warmup and a 2k cool down after finishing.
Had a massive head ache hit me during the 1st rep which really knocked me around during the rest of them. I ended up needing more than the 2mins recovery I was going to use and pushed it out to 2:30 recovery.
Reps were 3:33, 3:28, 3:35, 3:32, 3:34, 3:32. Then a 200m rep in 30 secs to finish.
Don't know where the headache came from as I felt fine before starting. Maybe due to not doing anything fast since November?