Kourtney Kardashianis jumping for joy — and showing off her assets while at it!
The 39-year-oldKeeping Up with the Kardashiansstar displayed her fit physique in three bikini photos shared to Instagram on Tuesday.
In the snapshots, the mother of three jumped on what appears to be a trampoline while sporting an itty-bitty black two-piece.
The first and third shots captured a happy Kardashian from the front while the second image pictured the reality star from the back, showcasing her tanned bottom under the sunshine.
Kourtney Kardashian/Instagram

This certainly isn’t the first time that Kardashian has shared photos of her toned figure with her fans.
Over the summer, the E! personality traveled withthen-boyfriend Younes Bendjimato Italy, touring Rome and hanging poolside at the five-star hotel Capri Palace in Capri.
And just how does Kardashian achieve her rock-hard body?
The 5’0″ reality star isknown to try out trendy diets,like ketoandintermittent fasting, and stays committed to her workouts.
A sourcepreviously told PEOPLEthat she aims to keep her weight consistent.
“She works out and eats in order to try to stay around 100 lbs.,” the source said, adding that Kardashian doesn’t want to get too skinny. “Yes, she eats very healthy but she wants her body to be healthy and not underweight or malnourished.”
Kardashian also has to focus on keeping her weight up, because “her body type is very different from her sisters’, ” the source said.
She first revealed in Februarythat she weighed 98 lbs., and pointed out that her son Mason Disick, 8, is 62 lbs., just 36 lbs. less than her.
Then, before working out, Kardashian eats her homemade avocado pudding, and has stovetop whole grain oatmeal afterwards. Lunch is typically a salad with lean protein like chicken or salmon and homemade dressing to limit sugar, and she has more veggies or fruit as an afternoon snack. And she goes light for dinner with soup.
She also tries to eat organic foods as much as possible and limits her sugar intake.
source: people.com