Just to counsel some additional advice on this - be aware that eating (and your diet) is much more important than exercise when it comes to maintaining a healthy lifestyle.
I point this out because I enjoyed exercising for many years before really getting to grips with this point. You can do lots of exercise but still eat badly and consequently not really make any progress.
However exercise is still beneficial.
There are lots of articles on this, but this NYT article[1] includes links to meta-studies for anyone interested in that level of detail.
Does anyone know or have any good ideas about how to donate money to her cause? (her website doesn't have any donate links on it).
I often find with stories like this, that are horrifying, that the least I can do to show my support is donate money to the cause in the hope that it can help those brave enough to pursue it.
I recently watched the fallout anthology run and some of the things the speed run community have discovered are amazing.