Four days in Quito, I think, really screwed with my practice.  I had to do things much more lightly and easily than I usually do, as a result of altitude.  And getting back into my normal rhythm has felt hard.  Today was the first day that I felt like I was back to my “normal” practice.  And it was tiring, rather than invigorating today.  I find that this is the case after any travel, though — it takes me a while to get back into my routine.