112mi in a week isn't a lot...if you're used to it.
I do understand how difficult it can be at first, though. I remember when I first started riding, I had a hard time doing 50 miles a week and would take a wednesday or a friday off from my commute. Generally, if I'm feeling wasted, I'll take a day off. If it was really brutal I might take two days off.
Hot showers--or if you're really hurting, soaking in a hot bath--do help, at least in the immediate term.