Intervals?

This week I embarked on a set of intervals up a small and very steep hill about 40 mins ride from my house. Since I'm not in that great of shape, this little hill repeat is quite brutal and I've been using my 39x26 (yes, 26) gearing to get thru it. I'm just getting myself into the groove of doing these and therefore I only did 4 this week. Profile shown below: