A new treatment that blocks an aging-related protein restored lost cartilage in old mice and helped prevent arthritis after knee injuries. Human cartilage samples showed similar signs of regeneration, raising hopes for a future drug that could repair joints instead of replacing them.
How about not life extension but quality of life extension instead (e.g. this post)
Indeed, I don’t really feel like living for more more than 90 years, I just want to be able to do what I like to do until I die.