The mum-of-two shared a before and after shot on her Instagram page which showed her two weeks after birth, and seven weeks after birth.
Luisa told fans, "2 weeks postpartum vs today 7 weeks postpartum. Stomach gone down & very slowly getting some kind of tone back, long road ahead!
"For those interested I've been eating well but not denying myself anything & doing Pilates, or toning classes at least once a day, sometimes twice and horse riding too.
"I STILL lack core strength which I discovered when schooling my horse today! But I'll get there! Loving my new leggings from H&M!"
The Apprentice star, who is already mum to six-year-old daughter Dixie, gave birth to her second daughter Indigo - her first child with new hubby Andrew Collins - this summer.
We're amazed at how trim she looks just a few short weeks on, and Luisa's been busy showing off her slim frame ever since.
The keen horsewoman tried her hand at polo on Thursday (22 September) and was clearly loving the energetic sport as she added, "Playing polo at Coworth park beautiful day for it so much fun."
She also took some much-needed time off from mum duties for a night out with her pals, but Luisa wasn't feeling so perky the next day.
Hauling ass to her nearest coffee shop, Luisa shared a jaded-looking selfie and said, "Sitting in my favourite local cafe, nursing my hangover with a nice latte & just scoffed a huge cheese toastie! #hangover #badmum #coffee."
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