(CNN) -- Karyna Douglass was a woman with a mission. The 5'7" 22-year-old dreamed of joining the military but more than a hundred pounds stood in her way.

So Douglass joined a workout program for potential enlistees and switched up her diet.

A year and three months later, Douglass is down 110 pounds and her mission is complete. She was just sworn into the Army on Dec. 12.

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