I just had a meet and was unhappy with my 50 times...about a second slower than two months ago in both events (free and ***). I swam regularly (2200-3000 three or four times a week), including for the two weeks just prior to the meet, but before that, I took an entire week off (actually, 9 days) for a ski trip to Colorado. Could such a layoff have affected my times all that much, given that I am only swimming sprints?
Missing 9 days of swimming certainly didn't help but I wouldn't attribute the full second just to that. After all, you were still exercising (skiing). I'd sooner say it was a combination of things but most likely your legs were the main culprit. 9 days of skiing would certainly tire them out and if the legs are gone so are your sprints. Maybe try doing some pulls the day before your next meet so your legs can rest up a bit.
Missing 9 days of swimming certainly didn't help but I wouldn't attribute the full second just to that. After all, you were still exercising (skiing). I'd sooner say it was a combination of things but most likely your legs were the main culprit. 9 days of skiing would certainly tire them out and if the legs are gone so are your sprints. Maybe try doing some pulls the day before your next meet so your legs can rest up a bit.