I see you very much enjoy putting forth your thoughts (evidenced by many posts...), but when presented with evidence to the contrary you lose interest - fair enough and you are honest - I respect that.
The facts under the law of all 50 US states (not sure about other countries...) are that they are equal and they have similar medical training. MDs and Osteopaths are very similar:
"DOs have all the same responsibilities and rights as MDs, including the abilities to perform surgery with proper training and prescribe medicine.
How Are MDs and DOs Similar?
MDs and DOs follow similar educational routes. They must first earn a four-year undergraduate degree, and most will take pre-medicine courses during this time. After getting an undergraduate degree, they will attend either medical school or a college of osteopathic medicine.
After finishing four years of medical education, MDs and DOs must complete an internship and a residency. A residency is on-the-job training under the supervision of more experienced doctors. Some MDs and DOs will also go on to do fellowships to learn more about a specialty."
So the very clear facts again under the law and by training is that Dr Goldhammer is nothing like Berg. Actually Dr Goldhammer is a serious professional with training and lots of experience Dr Berg is not currently practicing and has been in trouble with the law:
https://quackwatch.org/cases/board/chiro/berg/
So it is clear they are not similar at all.
I don't know your background you could be a MD or have a Phd in science; but I can tell you that I have no where near the training that Dr Goldhammer has and certainly not the clinical experience. So my opinons are not as good as his...
"Osteopaths do not have such a clinical history AT ALL."
You are clearly mistaken - Dr Goldhammer has more than 20,000 patients that he and his team (which includes MDs) has treated at his clinic much more than Dr Fung. and more long term fasting experience and I am not sure that Dr Fung does any actual extended water fasts at all - I think he advises taking supplements and the option of coffee etc.
So in summary there is no science that I have found (or you have cited) after a long time searching that says we should exercise while doing an extended water fast (more than 7 days and no supplements only water) and the many patients seen at True North by Dr Goldhammer and MDs have clearly shown that it is safe and advisable to not exercise while on an extended (true) water fast.
They have shown safety by never having a problem with more than 20,000 patients. They have shown low loss of lean tissue using Dexa scans.
I am planning to start an extended water fast soon and I was hoping that you could come up with some clear proof that exercising during an extended fast is a good idea. Or evidence that resting is harmful.