Especially calves and thighs.
I had 50min bike ride with some all-out intervals (only 12x20sec, but it was hard effort so legs were pretty trashed) followed by easy 6 miler, so it was a brick.
I can tell that my legs are not used to hard work anymore. They got wimpy in past month or so:) This should do them good.
Keep your fingers crossed, I am going to the US embassy for visa interview tomorrow.