I was fairly desperate to run earlier, only I had a common-sense assessment of my condition when I got home from the office & realized that instead I would be better off eating and sleeping! Slept for two hours, which was imprudent but necessary - felt very groggy when I got up, definitely in no condition to run, but I did make it over to the gym for a short swim (I must take advantage of the pool being deserted due to finals and open only for one more week before the holidays).
(I should remind myself, though, too, that a short run is often an option too - I should have more 3- and 4-mile runs when I am too tired or underfueled for it to be sensible to head out for a longer one.)
All easy, except for the fly! It was very refreshing, too - I am glad I got myself over there.
100 right-arm, left-arm, catch-up, swim
100 thumbs and salute freestyle drill
2 x 75 stroke as kick, drill, swim by 25 (first one fly, second one back)
1000 yards total