While the post-baby fitness efforts of Rebecca Romijn are admirable, we think we have a hunch to what's motivating her.

Take a peek at Romijn's husband Jerry O'Connell on the set of his latest movie, looking impossibly fit on the shores of Lake Havasu, AZ.

Rocking a red Speedo and a washboard chest (don't miss his ripped back), O'Connell looks in perfect shape to fight off water monsters in the update of Piranha he's shooting in 3D.

While the fish should be scary, we look equally forward to seeing his three-dimensional abdominals.

(Photo: Splash News)

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• TAGS
• Jerry O'Connell
• Rebecca Romijn

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