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Not only did first-time mom Jennifer Lopez, 39, give birth to twins Max and Emme last February—a feat in and of itself—but to get back into “Jenny From the Block” shape, with the help of Gunnar Peterson, she also began training for her first triathlon, which she successfully completed in September. Her regimen included a mix of running, swimming and biking up to six times per week. Soon J-Lo may not need to bother with her cross-training, as running after twins could prove to be exercise enough.

WENN
     
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