To be tired it is only in your mind.
A bodybuilder is a sculptor who carries with him his own material.
Genetics help to some degree, but the most important thing is the mind and the spirit. These two are even more powerful than physical characteristics that are passed on.
To be a good bodybuilder you must be a good observer.
My MIND POWER gave me this body.
Eat a lot and train hard, I am sure that you will succeed.