Take care people over 40. Especially when lifting heavy weights. Eating connective tissue, collagen, thin bones and bone broth, on the keto diet should give more protection for your aging body that simply cannot handle the same wear and tear you forced it to endure in your youth.
It appears the body is giving out at around 40, especially these connective tissue injuries are common. Most notable persons I know of:
Muscular Jace Hall, famous game developer[Monolith] and
Jace Hall Show creator, complained in his blog years ago that during a heavy weight pushing exercise something has torn in his back while lying on the bench and he can't do same amount of exercises ever since.
Jet Li, the famous asian martial arts movie actor complained that during a shooting he felt something being torn inside him [torso area] and it is causing him pain since and he cannot do his more daring martial arts stunts anymore. Doctors couldn't find anything. Age and ignorance about the diet and thoughtlessly continuing the youthful lifestyle and forcing the aging body to endure physical strain that a young body could bear.
Inflammation increases with increasing toxicity with age - as an aging body fills up with toxins reaching critical levels - and could cause tissues simply giving up.
Could continually multiplying micro fractures in the bones [from shocks] have their cousins in the fascia and tendon injuries: where fascia and tendons could suffer micro-tears that build up with time to a point, where it becomes suddenly completely torn?
Gurdjieff tells the tale of a wooden carriage of fantastic quality, freshly built that runs so splendidly for years and years then as it suffers mounting damage, in the end it suddenly explodes into wooden fragments and is destroyed.