Non-sexual term for spread-eagle

This word is just not coming to mind. The closest I can think of are "arms and legs asunder" but that conjures up some pretty graphic and unintended imagery. Same with spread-eagle which is the first term that came to mind.

My question is, is there some word to describe a person laying on the ground with there arms and legs spread that doesn't carry the same sexual connotations as spread-eagle. Example:

She lay ____ on her back after she had fallen from the jungle gym, the air knocked from her lungs.

The part where other words I can think of (such as haphazardly) don't fit, is that spread-eagle seems to imply lying down which is something I would like the alternative to do as well though without the sexual connotations.

I've never heard of spread-eagle, where I come from, people say spread out. Nice to come across new expressions :)

She lay spread out on her back after she had fallen from the jungle gym, the air knocked from her lungs.

Hmm, tough to find an exact fit, though in the place of a sentence like that I often see the following words (though these tend to specify the positioning of the object in question):

(from merriam-webster)

See this one quite commonly used

Prone

lying with the front of your body facing downward

or, less commonly

Prostrate

lying with the front of your body turned toward the ground

A less imaginative alternative is of course flat