3. NEVER train if your MD, PT, PA, chiro, masseuse, dentist, mechanic, dog walker, hair stylist, relative, or barista tells you that you shouldn’t be lifting weights . . .
. . . especially if they tell you that “you don’t need to be lifting those heavy weights!” These people have an intimate understanding of your goals, your training history, and what goes on in the weight room when you train, so always pay attention to them. Also, these people are your masters. Do what they say. That’s why they pay you . . . wait . . . no, nevermind. Do not think, talk to others, evaluate, and then make a decision for yourself. You might start to develop an independent spirit. Self-reliance, even! This would be Bad.
4. NEVER perform the Olympic lifts if you’re over 40.
Old farts like you die every day doing these lifts! What were you thinking?! Don’t you know these lifts have to be performed with absolute perfection?! Arm pull? Death. Less-than-optimal rack position? Death again. Just not very explosive in general? Death to you and your progeny!