J.Lo Closes Out Summer With a Bikini Instagram That Makes 51 Look Like 31

From Prevention

• Jennifer Lopez posted a new bikini photo on Instagram, showing off all her strong, toned muscles.

• The singer is lounging on the beach, and writes "Holding on to the last few moments of summer."

• J.Lo maintains her muscles with an intense workout routine with celeb trainer David Kirsch and A-Rod's longtime trainer Dodd Romero.

Big announcement: Jennifer Lopez is back. If you're thinking she didn't go anywhere, you are also correct. However, her summer swimwear posting was pretty much nonexistent, until now.

J.Lo shared a brand new bikini snap on Instagram, and she looks all kinds of toned from head to toe. The superstar's also looking super chill lounging on the beach. She wrote in the caption: "Feeling golden. ✨ Holding on to the last few moments of summer ... 🌤 #GlowCheck"

The question on everyone's minds: How does the 51-year-old maintain those killer abs, toned legs, and strong arms?

Well, she works hard for all those muscles. When she's in New York, J.Lo works out with celebrity trainer David Kirsch, whose other clients include Margot Robbie and Britney Spears. "When Jennifer comes in we do a 30 to 45 minute workout," he told Insider. "The quickest, most effective workout for your butt is the platypus walk," he added, because it lifts and tones the butt and works the inner thighs.

Here's what J.Lo's platypus walk looks like:

That's not all. J.Lo has also been training with A-Rod's longtime trainer Dodd Romero, who shared her abs routine with O, the Oprah Magazine. She knocks out 50 hanging abs raises, 50 rope crunches, and 50 incline sit-ups with a 45 pound plate, then a set of 35, followed by a set of 21. Phew!

Her diet also factors in. Her personal chef, Kelvin Fernandez, shared some insight into J.Lo's typical eats. "Sparkling water, always fruits and vegetables, like strawberries…There’s always greens like spinach, cucumber, and celery to make green juice. They love starting their day with a green juice." he told Us Weekly. All her hard work clearly shows, and she definitely deserves some chill beach time.

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