[Dynseli]

As to muscle changing the bones, I can tell you - IT DOES, to limited extent. Ugly beast, too - think shin splints, osgood schlotter's disease, bone spurs. NOT effective for our wants, and painful enough I wouldn't think we'd even make the connection. What happens is the tendon pulls part of the bone away from the rest of the bone, and the body heals it. So far, OK, recoverable.
BUT, repeat multiple times in one place? Messy and ugly. Think of a karate champion's hands, or the googles should give you some idea, especially Osgood Schlotter's. I have it - it's just a spot on my knee where the bone was crushed and shifted. And that was done several hundred times climbing out of a pool.
Now it's a lump, where the bone calcifies, dies, and then is presumed injured - and re-calcifies, and those cells die, and...
By the time I die in 40 years, say? Might grow to be the size of a garlic clove. Ineffective, painful, unpretty. :-P
I don't even want to think about how you'd do that to your hips, and I've been damaged that way, too. :-(

Scary where we end up sometimes... ;-)

-Dianna

I'm in no way referring to scar tissue and damage to bone, by unhealthy exercise or jerky movements. With an increase in healthy muscle, bones become slightly thicker, healthier and stronger.