Early morning wet hill session

I marked my 52nd birthday with a hill session in very wet weather: nine two minute climbs, with three minute recoveries and the usual mile warm-up and cool-down.
Time: 1:06:03
Distance: 6.22
Pace: 10.37 (best 8.07)
Average heart rate: 144
Distance and pace for the nine climbs, from which it is apparent that I slowed down as time went by, with the exception of the last climb, when I made an effort:
Climb 1: 0.21/9.41
Climb 2: 0.22/9.08
Climb 3: 0.21/9.23
Climb 4: 0.21/9.34
Climb 5: 0.21/9.43
Climb 6: 0.20/10.06
Climb 7: 0.19/10.38
Climb 8: 0.19/10.17
Climb 9: 0.22/9.15