Checking in with Catherine Zeta Jones

I haven’t seen celebumom Catherine Zeta-Jones out and about, or even on the gossip sites in a while. Turns out the actress is busy filming The Rebound, a new flick in which she plays a divorced woman who tries to keep up with her new, much younger man. (Hmm…maybe she can ask hubby Michael Douglas for tips on keeping up with a more youthful partner.)

Page Six reported this week that their spies spotted Catherine in the cardio room of Club H Fitness on East 34th Street in New York, which was shut down the other day while she shot her new movie–for 15 hours straight. “She was so beat, in between scenes she’d lie down on the massage table in the middle of the gym,” said one of the paper’s spywitnesses. “But they’d tell her she had to be back on set right away.”