Jessica Simpson says she's in pain after working out with trainer Mike Alexander.
"Why am I still hurting from our workout earlier? I'm getting old!" the 29-year-old posted on Twitter Wednesday.
That doesn't mean she's quitting the gym.
"See you tomorrow with a pouty face and sore buns," adds Simpson, who will star next year in a VH1 reality show, "The Price of Beauty."
"I will never understand why people attack for a laugh," she has said. "Own your beauty and don't listen to the judgement [sic]."