Why are so many people afraid of Crossfit?

A few years ago I used to be really out of shape, and then I decided to join a local Crossfit gym to lose weight. I love Crossfit, it's so much fun. I just wanted to get an idea of why so many people are afraid of Crossfit?

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abe182 · 51-55, M

I have a herniated disk. I think that what they do is brutal to the spine. I have a friend who is all gung ho about it and wants me to go too but I will never!