Interval Distance 
500m x 15+ sets
1:00 rest

open rate

Start as fast as you feel like you can sustain (around 2k plus 8-12, likely). We don't want to redline early, and we want to just "flirt" with that 85-90% intensity. Aim for 15, but feel free to continue past and stop when pace become unsustainable. While there was no degradation in my pacing, I just could not continue on any further. It took all I had to get to 15 intervals. Looking forward to a couple of rest days.