You hear all kinds of reasons why people want to lose weight. Some drop pounds for a loved one or for their health; others do it because they're about to go on vacation and simply want to look a little more fit in their swimsuit.

Karyna Douglass shed 110 pounds in one year and three months. Her reason is a little different: The 23-year-old wanted to join the Army. Her hard work and dedication paid off, and Douglass will be sworn in on Dec. 12.

The idea to join the Army started when the Portland, Ore., resident went on a whale-watching trip for her birthday.

"The Coast Guard was out there," Douglass recalled to Fox affiliate KPTV. "Everyone in the boat was like, so awed at these men. I was just like, 'They're really idolized.'"

But Douglass admitted to the TV station that to her, physical activity consisted of walking to the store to get candy. She changed her habits after linking up with a sergeant in Beaverton, Ore. Douglass worked out two to three times a day and ate healthier.

Fast-forward a year and three months, and Douglass is preparing to join the ranks.

"I want to live the Army life," she said enthusiastically. "I want to take the uniform and run, and see how far I can go with it."

To think that after the incredible feat of losing over 100 pounds, Douglass' journey is just beginning.

Douglass says her advice to others is to surround yourself with the right support. What's your advice for losing weight? Let us know in the comments.