Thanks to Laura for pointing out an article on this topic.
I've read through it and it hasn't deterred me from trying this program, though I won't have the time or money to do that immediately. It will certainly help me be careful when I do check it out, though!
Laura mentioned in her first comment that she's heard some people are injured doing the CrossFit program, and now in a new comment that some researchers had found that indeed 16 percent of people in one CrossFit program they investigated had ended the program early because of injuries.
What is striking about this whole thing is the outrage from the CrossFit community, as seen in this article from "Outside" magazine, reporting on the report. This article comments that the injury figure is "a soft number" and does not represent overall injuries. The original research concluded that people of all fitness levels "...all lost body fat and
saw a jump in performance over 10 weeks of CrossFit training. The
injury statistic was, literally, an afterthought."
So, what's the big deal? When I get a chance to try this out, I'll be careful, as Laura originally suggested, to stay within my body's limits, not respond to peer pressure to lift more weight than I can reasonably do or to do exercises I know will strain my already-strained joints, and so on.
The "Outside" article concludes, "That's a great description of the impasse CrossFit now faces.
Desperately wanting approval, it has circled the wagons and worked
actively against the very means to its validation. The biggest problem
CrossFit has is itself."
Anyway, thanks again, Laura. And I've found another book comparing various fitness programs, which I'll review when I finish reading it.