Elderly individuals with hip fractures had significantly smaller psoas muscle volume compared to age-matched controls in a South Korean study.

“there was a study done out of South Korea that looked it was it was an imperfect study but it was pretty decent they took a group of I think it was it was retrospectively evaluated but they took CAT scans of people who were in for a hip fracture a femoral neck fracture elderly population and they measured the volume of their psoas muscles so this is the psoas muscle and this is the iliacus together they make the iliopsoas muscle attaches here and this is what picks your leg up that's what lifts your leg up so if you're you stumble you pick your leg up to save yourself they the volume of that muscle was significantly smaller than that of an aged matched control group who were getting CAT scans for other reasons”