The best is hand exercisers for an entire 30 minute 1x1. That was my first 1x1 with said manager after I got reorganized under him. He tried to hand me a really awful Excel project at minute 29.5 after asking me what SRE means and what I do for the first 29 to a wonderful squeak squeak squeak soundtrack, and I immediately handed him my badge and left the premises. (True story. Not proud, but I couldn’t stay sane 30 minutes, let alone 30 quarters.)
Crossfitters do seem to be a bit more... intense... about it than people who just lift. It can be this whole lifestyle and almost religion with some of them, particularly if it is dual-classed with other health & fitness fads, which is a little tiresome to be around.
I have my doubts about Crossfit being a healthy long term proposition. From what I have seen only a few people keep it up long term. It seems more like a short term rush. Reminds me of people who get into running, then train for marathons, do one and then stop running because the effort is too much.
I don't think anyone is against CrossFit. The general concern is that many of their athletes lift weights with poor technique and eventually end up injured, which isn't healthier at all.