Program : 3km warm-up.
2 x 60 seconds up hill....jog down.
3 x 40 seconds up hill...jog down.
I did the above session but hated just about every minute of it....it was so hot! I'm starting to think I just can't train in this weather. I'm 'good for nothing' for the rest of the day....except for watching tennis!
Results : MHR, according to Garmin, for each of the above hill repeats : 99%; 99%; 82%; 81% ; 76%.