Kai Trump squeezed in a pre-prom gym session, proudly boasting about her ultra-low body fat and flexing her sculpted physique before the big night, Breaking Celebrity News can reveal.

Donald Trump's eldest grandchild, 18, went on to prove she can lift more than her body weight, as the aspiring golf pro makes a comeback after surgery on her left wrist in January.

While doing her lunges, the woman filming Kai gushed, "Look at your side muscle," on her thighs.

"I know. 13 percent guys," the eldest child of Donald Trump Jr. and ex-wife Vanessa Trump crowed.

Kai admitted that her upper-body gains took a hit after surgery, revealing she’s been stuck doing "no arms" workouts since November 2025 while recovering. "I’ve lost it all," she lamented about her missing muscle.

But her legs are still powerhouse strong, cranking out squats with a whopping 125 pounds on her shoulders.

"Oh, my god… It's more than me," Kai marveled, stunned as she powered through the heavy lifts.

Kai showed how her family connections help her stay in shape, revealing after she was done at the gym that she was heading over to "Trump Jupiter" to "play some tennis," referring to her grandfather's Trump National Golf Club in ultra-wealthy Jupiter, Florida.

But even being the First Granddaughter couldn’t secure her court time, as a clinic took over, forcing Kai and her partner to pivot to the putting green instead.

"I feel like I’m going to be way better of a golfer when I come back than I was before," she predicted, confidently sinking putts and flexing "still got it" as she nailed her shots.

Kai made it clear she’d rather grind it out on the course and in the gym than glam up, playing right up until the last possible moment before prom prep kicked in.

While her friends were likely getting pampered at salons, Kai rolled in from the golf course with just 30 minutes to spare before her crew arrived, proving she’s all about sweat before sparkle.