I have no idea. Maybe it would be better to break the fast just in case?

I am sorry you broke a bone. I know from experience and study the body works very hard during a juice fast or any type of cleanse. This work needs to be done when we are able to rest and put the least amount of stress on our body. Since you broke a bone I would personally break the fast and give myself lots of green leafy vegetables for healthy minerals needed for the bone to knit properly. Additionally I would keep my fruit content high for good energy levels. pererably mix sweet with non-sweet fruits. this will sustain the energy over a period of time with less crashes if any.
And of course plenty but not too much plant based protien to support healthy mending as well while staying alkaline.

Happy mending I hope,
Felice