Emily Simpson before and after her 40-Lb. weight loss.Photo:Tommy Garcia/Bravo/NBCU Photo Bank via Getty, Emily Simpson/Instagram

Emily Simpson

Tommy Garcia/Bravo/NBCU Photo Bank via Getty, Emily Simpson/Instagram

Emily Simpsonis the “strongest” she’s ever  been.

On Tuesday, theReal Housewives of Orange Countystar, 47, shared avideo compilation, showing how she’s been able to lose 40 lbs.

Simpson’s video begins with a photo of her holding a bottle of water at the beginning of her fitness journey. The clip then switches to her doing various exercises at the gym, including pull-ups, before ending with a photo of her showing off her figure in a white bikini.

Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.

Emily Simpson.Emily Simpson/Instagram

‘RHOC’ ’s Emily Simpson shares inspiring message on fitness journey

Emily Simpson/Instagram

“I am the strongest (mentally and physically) right now … at age 47 … and I will continue to improve myself daily. My only competition is Me ❤️💪🏻,” Simpson continued in her caption.

TheRHOCstar, who has had severalplastic surgeries,went on to thank her fans for following her journey and encouraging her with kind words. She also had a message for the “haters," saying: “For the haters out there.. I love you too! You motivate me daily to lift harder and eat better ❤️💪🏻🙌.”

On Wednesday’sepisodeof the Two Ts In A Pod with Teddi Mellencamp and Tamra Judge podcast, Simpson revealed that when she gained weight at 42, it was not the result of lifestyle changes.

“It’s not like I went out and changed my diet or I got depressed,” she said. “I think it was all hormonal and just being middle-aged and you know, probably dealing with the show and not dealing with it well.”

Simpson went on to explain that she decided to take her fitness seriously because she wanted to feel comfortable and “feel like myself again.”

source: people.com