"All the hours in the gym and all the years of dedication to help me get to this moment."

Holly Holm's second-round knockout of the heavily favored Ronda Rousey last weekend sent shockwaves through the UFC world. The fighter celebrated all the hard work that went into the victory in an Instagram post on Monday.

"All the hours in the gym and all the years of dedication to help me get to this moment," she wrote.

A photo posted by Holly Holm (@_hollyholm) on

The 34-year old also thanked her coaches, as well as others who helped build her MMA career. According to USA Today Sports, Holm is the first person of either gender to hold a boxing title and a MMA title.

Before her career in MMA, Holm boxed for numerous years. As ESPN notes, in 2005 and 2006 she was named Ring Magazine's Female Fighter of the Year and won a boxing title in three different weight classes.

Holm out-classed Rousey during their match, demonstrating superior boxing ability. Her barrage of punches in the first round took its toll on Rousey. Holm was then able to finish the job about a minute into the second round.

It's pretty safe to say she's stoked about her bantamweight title.

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