P90X Compared to Crossfit

I had heard some discussion about P90X but I didn't know exactly what it involved and how it compared to Crossfit. Now, after reading this article, I can explain the differences between it and Crossfit when I am asked.

"CrossFit and P90X are two highly popular operating systems revolutionizing the way people think about fitness. Here's what you need to know about them": Click Here

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