Don't know the current details, but I can report that when DD attended USAFA SS several years ago, the fitness sessions led to a bit of barfing into trash cans. DD said the sessions weren't very strenuous. It was simply the effects of high elevation (7000 feet!). DD is a high-elevation kid, so it didn't bother her at all. But this anecdote gives reason to not doing CFA at SS -- results surely would suffer for most.