It's true that some people are simply genetically wired to put on big muscles.
It's also true that many others aren't -- some are either big-boned or come from a family with a history of obesity, while others are just plain scrawny.
But remember that while genetics can be a factor in the success of your muscle building regimen, it's not all there is to it.
The fact is that anyone, no matter what body type they have, can build muscle and get a superstar physique.
Genetics may give you a head-start, but to finish the race, you'll need lots of discipline, optimism, and plain old hard work.
Building muscle means sticking to a regimen that encompasses (1) your diet, (2) your workout routines, and (3) the amount of rest you get.
#1 - Watch what you eat -- and how much of it.
You'll need a good combination of protein, carbohydrates, some good vitamin supplements, and lots of water.
Carbohydrates will give you the energy to work out as much as your body can take, and protein will help build muscle while you sleep.
#2 - Train your muscles by groups.
The good muscle groups to train on any given day are chest-shoulders-triceps, biceps-back, and legs-abs.
Many people train these three muscle groups on three different days of the week.
This prevents overtraining, which can be harmful to muscle growth.
#3 - Get lots of rest.
Muscles actually grow while you're asleep, so it's important to get enough rest every single day, otherwise you'll be missing out on some major muscle growth.
You may find that your training partners who have better genetics may experience muscle growth sooner than you, but don't lose hope.
Muscle growth may start slow for you, but you'll see results after a while.