Do we always need additional/external weights, or are there any body weight exercises that can target your bones? Perhaps leg bones are easier since the body weight goes through them. How about upper body (like shoulder area) and the spine?
Pull-ups/chin-ups/dips are probably the best upper body weight exercise, followed by classic floor exercises pushups and leg raises for the core.
Many of these stress bones in addition to the muscles.
[1] http://www.deakin.edu.au/about-deakin/media-releases/article...
The difference is absolutely incredible, I thought it was supposed to take weeks to see changes and then I tried that and it was nearly instantaneous.
I'm familiar with kettlebells from Crossfit, but I know CF catches a lot of flak for how they use them.
[1] https://www.onnit.com/academy/full-body-kettlebell-workout-f...