Showbiz
Rex Features
The singer intends to take part in the endurance race in the autumn, just eight months after giving birth to twins.
She has hired Beverly Hills fitness guru Gunnar Peterson to help her shed 20-25 pounds and prepare for the event.
She told People that she would compete in the race - which consists of swimming, cycling and running - "probably in October, September/October", adding: "I want my babies to be proud of me."
Lopez and husband Marc Anthony welcomed twins Max and Emme on February 22.
> Lopez reveals motherhood doubts
More: Jennifer Lopez, Showbiz
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