Week 4 intervals

Tried the mit track today.  Closed.  Switched my 10x400s to 6x800s, and did them off-track, along the esplanade.  They were a bit slow.  Not sure why, maybe the heat, or off-track slows me down more - but they came in at just under 6:50s.  If I miss my BQ time, I'm blaming it on all these closed tracks.