I had forgotten how simultaneously good and bad the first day of a new job feels after a stretch of unemployment. On the "bad" end of the spectrum are getting up at 4:30am and having muscles I didn't know existed ache in an evil, throbbing sort of way. On the "good" end are things like finally having a paycheck again, the satisfaction of a solid day's work, and the knowledge that those heretofore unknown muscles will soon be firm and sculpted.
I'm also very glad that my showerhead has a massage setting. I can't knit when I ache like this.