You're generally a lot better off than those human punching bags you're always reporting on. However, if you're ever called upon to interview that Tennessee linebacker who's known for stepping on people's heads after they've been tackled, we put your chances of survival at around 60%.
Chances are, if you're broadcasting sports, you probably played them earlier in your career, and that's where the real physical danger exists. If you survived that experience, you should be able to survive talking to a camera. That thing won't go for your knees.