A few weeks ago I wrote an article about the constantly changing face of fitness and how, as fitness professionals, we must be able to consider disposing of outdated ideas (and replace them with superior proven ones)
You have to be willing to test new theories and adopt something different if it proves to be a better way, and be ok with the change.
On the other hand, you have to be cautious of what I like to call “evolutionary 180’s”. This is an idea that suddenly and without merit attempts to turn upside down the accepted (and tested) standards in fitness.
 Evolution happens slowly. If a trait works in a certain environment better than its previous version, it will flourish and eventually become the standard.
The same thing should be true for fitness. Almost every week there is a “breakthrough” in fitness where some supposed fitness guru attempts to turn the fitness world on its head with the latest fad.  Fitness fads are untested 180’s.
New ideas and fitness theories are fantastic, but they must be tested and retested and then tested again before they can be labeled “the latest fitness breakthrough.”
Be open to the newest ideas, but attempt to DISPROVE them again and again.  If you can’t, you’ve got an idea worthy of adding to your fitness toolbox.
Some of the most obvious fitness fads right now:
1) extremely high volume and high intensity workout programs (with no intelligent program design)
2) (Dys)functional training. Following the advent of functional training came the dysfunctional nightmare of random “cool looking” exercises that match no clients need in real life.
3) Foam rolling and mobility exercises with no targeted purpose other than the thought that “stretching and foam rolling are good for you.” They are, sometimes, for specific areas on specific people.
Matt Pirtle MA CSCS