I have found the same as each week goes on, but the plan is about the the cummalative load it puts you under during the week, so more than likely your resting HR was slightly higher today as you had not completely recovered from the last session perhaps. You do have some leeway in the RPM on the O/U sessions so I just lower the RPM a tad to keep it in the zones. Did you start to feel the burn in your legs on the Over parts?
I had another SEPI session and it was a hell of a lot easier to get above 182 this time round, even hit 194 tonight.
One thing I did notice from the first time I did the test to the second time that the results had increased in distance covered and the HR values. So either I’d got better and/or was prepared to push that little harder knowing what I was capable of.
This is the first time you have tried it, wait and see what the effects are. You can always push a little harder if you ever try it again once you know your limits a bit better.