Adjust or Stay the Course

Starting a new training cycle and did a 4x5’ [1’] running today. I did all 4 at the same pace and could have done another but my HR seemed a bit higher than I expected. My previous cycle was strength focused and my anaerobic capacity has always been pretty high.

That said, is it better to keep the intensity as is and let the LSS and LSD work eventually flatten my HR or is it better to reduce the intensity to get a flatter HR now?

Depends on what you are after? Intervals of this lenght are usually intended to get max HR to 88-90%+. HR is reation to your pace, why would you want it to flatten on shorter intervals? Long easy runs are where you focus effeciency and economy.