Hip protection clothing exists, but some current versions are
- fit outside existing clothing, and so not "invisible"
- ineffective according to research
- poorly marketed
My idea would be to combine the wearability and aesthetic design of Spanx-type underwear, which is designed to shape the abdomen, with motorcycle protective gear technology, which is designed to protect body parts at impacts from highway speed crashes. The goal would be to develop an aesthetic undergarment that provides enough impact resistance to prevent or reduce hip fractures. A key design criteria for Spanx was to be as visually attractive as normal undergarments. This was a major factor in its market acceptance.
A looser fit than Spanx would be better for older people who have arthritis or difficulty gripping. Other protective clothing such as biking or rowing shorts could also be reviewed for design inspiration.
Prototypes should be evaluated to provide research-based evidence of efficacy.
Research with existing hip protectors is collected at http://tytex.com/products/hip-protection/clinical-articles/