Force Your Muscles to Grow
You cannot gain weight fast by asking your muscles to grow. They won't respond to hints or suggestions. Muscles will grow only when they are
forced to grow.
Your body will naturally resist building muscles. Extra muscle will require extra energy and as you know from the
diet pages, your body is concerned about energy supplies. The amount of muscle you have now is the amount your body has determined you need. It makes this determination based on genetics, diet and the demands placed on it by your life.
You can't change your genetics but you can increase your diet (supply the body with what it needs to put on and sustain new muscle) and through weight training you can change the demands you place on your muscles.
In other words, you have to make your body believe that it needs more muscle, that
it needs to get to work on building muscles when it has the chance (while you're resting). You make the body believe this through your training (progressive overload). Then, through your diet, you must prove to it that you can consistently provide the materials it needs to build and sustain this muscle.
The body is not easily convinced of anything. You must be consistent. It is when you put together a program that accounts for all of the above that big muscle gains start occurring.
*shameless copy n paste*
you need to work out so hard your body understands it
needs to be stronger. you need to keep at it till it knows it isn't going to change that it HAS to change to do what you
consistently demand of it. you give it the fuel to build with and rest periods in which it
will grow if the demand is there and is consistent. i don't think it matters a bit what order you do anything in or if you're lifting weights or carrying gay guys around on a beach. your body just has to think it's not cutting it as is, have the fuel to grow, and get good rest.