To make sure I give you exactly what you need, could you clarify which of these you were interested in?

: Are you looking for academic studies on muscle physiology , aging (sarcopenia) , or lipid dynamics in mature females (either human or in marine biology, like the Gulf Menhaden study )?

It looks like your request for "proper paper: 'mature female muscle'" could refer to a few different things depending on what you're looking for.