Alisia McKennon “was always kind of curvy” growing up, buther weight hit a new highafter she had her first child in 2013.

“With my son, actually I only gained about 20 lbs. during my pregnancy. But after, I gained 60 lbs.,” McKennon, 31, tells PEOPLE for the2019 “How I Lost 100 Lbs.!” feature. “I never stopped eating like I was pregnant. I just couldn’t get out of it.”

The Fayetteville, North Carolina-nativestruggled to keep up with her sonas he grew into his toddler years.

“I would be so out of breath trying to run around and catch him,” she says. “He’s very spunky, like most little boys, and I felt really bad that I couldn’t keep up with him. I would tell him, ‘Oh, it’s too hot outside, let’s go back inside,’ just because I was tired. Sometimes I would cry about it and wonder, why did I do this to myself? Why did I get this big?”

Alisia McKennon.Courtesy Alisia Mckennon

100 pounds before photos

McKennon’s size was also keeping her from realizing a longtime dream of joining the military.

“I’ve always wanted to join the Army, and for my height, you have to be 158 lbs. to start basic training,” she says.

Still, McKennonkept putting off losing weight, until a Dec. 2016 visit to the doctor changed her mind.

“I started to realize that my neck was getting darker, almost black,” she says. “At my annual checkup, my doctor told me I now had high cholesterol, I’m possibly pre-diabetic and the black stuff that was growing on my neck was an early sign of diabetes. That woke me up.”

McKennon decided to join WW, which she loved because she “didn’t have to do a diet.”

“I’m a Southern girl, so I love my biscuits and rice, and with WW I can have that, but in moderation,” she says. “It was great because I had some good weeks, some bad weeks, but they always met in the middle, and I met my goal.”

For more on Alisia and four more women who lost 100 lbs., pick up a copy of PEOPLE, on sale Friday

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She did have some difficult moments — but they helped McKennonget to her goal.

“One time I literally cried in my car because I wanted a cupcake so bad,” she says. “I was already about to go over my WW points, and I was sitting outside of my favorite bakery. And I literally sat in my car and cried, and I drove off. I said I’m not going to get it, I’m going to do good. And I felt extremely proud of myself, because I finally didn’t give in.”

Alisia McKennon.Tory Rust

alisia

In March 2018, just over a year aftershe started her weight loss journey, McKennon hit 158 lbs.

“That’s when I joined the military,” she says. “I weighed in and got processed through, and I was like, ‘Oh my god, I did it.”

McKennon went through basic training for two and a half months andgained some serious muscle, putting her at a weight of 169 lbs. And “now I’m a real soldier,” she says, working as a paralegal specialist in the Army.

“I feel so good, better than I could’ve imagined,” she says. “If you asked me before, I would have never guessed that I would be at this point. I had some really, really dark times, and thought that this would just be my life.”

“Now I’m happy. I can keep up with my son, he’s six years old now and we run together — it’s a really good feeling to be here.”

source: people.com