From memory, since I don't want to hack through the podcast again: He came up with an extreme example (something like Crossfit + an hour of cardio a day) and then clarified by saying that Crossfit can be very good, but it's important to have a coach rather than do it on your own, and also something to the effect while it's better to get blood tests and such, you have a clue that you're pushing yourself too hard if you're developing sleep problems.
From his blog: On combining fasting and exercise.
From a different source: Serious problems with "Strong is the new skinny"-- take a took at the number of comments from coaches who say they have to restrain their clients from over-training. I think there's a cultural problem.
This is a thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. The previous "stupid" questions thread is at almost 500 questions in about a month, so I think it's time for a new one.
Also, I have a new "stupid" question.