Did someone say my favourite word?!? 
FWIW, I have a 2-week block of Threshold coming up (in a couple of weeks).
3x Threshold + 1x VO2max
Definitely doable if one has the opportunity to do proper R&R. Goal for me is simply building basic fitness and firing up all the available systems after a year-long lay-off. March I did a bunch of mixed bag stuff just to get back into it. April contains 3-week block of 3SS+1VO2 (2on/1off) and the mentioned Threshold block (same protocol). After that, it’ll be back into “real” structured training.
