^^^ that and knowledge and experience. its always a good idea to get the facts first and not listen to your buddy at the gym. most guys at the gym are full of it when it comes to advice, there is usually big difference between the advice you give some guy at the gym and what you actually do.
this definately isn't something you want to learn the hard way or on the fly..
this definately isn't something you want to learn the hard way or on the fly..