Key Genetic Factors for Successful Bodybuilding: Ideal Genetic Potential


Ideal Genetic Potential: Key Hereditary Factors for Successful Bodybuilding

What are the ideal genetics for bodybuilding? Which genetic factors determine your success in professional bodybuilding? After reading this post you will be able to determine do you have the ideal genetic potential for bodybuilding. In other words, you will discover key genetic factors for successful bodybuilding.

Seven Key Genetic Factors for Successful Bodybuilding

So what are the key elements to tell if someone has “good genetics” or is seriously gifted for the sport of bodybuilding and fitness?

Here is the list of the most important inherited traits that affects your success in bodybuilding:

  1. Your maximum number of muscles fibers;
  2. Your percentage of fast-twitch and slow-twitch muscle fibers;
  3. The shape of your muscles when they’re fully developed;
  4. Muscle insertion;
  5. The size of your bones and joint structure;
  6. Somatypes;
  7. Your metabolic rate;

You can use this information on genetics to determine your own genetic potential.


Your maximum number of muscle fibers is the first key genetic factor that will determine your genetic potential. Here’s something to contemplate the next time you stumble across one of your baby pictures. The squishy little diaper-loading machine in the photo already had all the muscle fibers you’re ever going to possess.

Those fibers surely became bigger as you grew. They can also become more bigger if you give them sufficient exercise. Conversely, if you don’t exercise them enough, they may become smaller.

It’s generally believed that muscle fibers can’t increase in number during your life.

This inherited number of cells is largely responsible for the amount of mass you can develop.


The ratio between a fast-twitch and a slow-twitch muscle fibers is the second key hereditary facor that affects your success in bodybuilding.

In addition to the number of muscle cells, genetics also determines the type of muscle fiber that is predominant in the muscle cell: white (fast twitch) or red (slow twitch).

Unfortunately, a fast-twitch fiber can’t turn into a slow-twitch fiber, and a slow-twitch fiber can’t become fast-twitch. Because you’re born with all the muscle fibers you’re ever going to have, you’re also born with a predisposition toward either endurance-type activities or strength-and-power sports (such as bodybuilding), depending upon which type of fiber is predominant in your body.

Some people are simply born with more slow-twitch fibers, which makes them genetically suited for endurance sports (long-duration, low-intensity activity).

Those born with a predominance of fast-twitch fibers have a huge advantage in sports involving quick bursts of speed and power that don’t have to be sustained for more than a minute or two.


This is another important genetic factor for successful bodybuilding. If your father or mother had beautifully rounded biceps after a few years of strength training, chances are you can develop some nice-looking, beach-friendly muscles, too.

You have to understand that the eventual shape of a muscle is determined by sperm and eff first, barbell and dumbbell second.

The muscles should sweep off the bone and flare out and away. This is the only genetic prerequisite that can’t be assessed until you have built some muscle. It would be latent until the muscle grew a substantial amount from it’s untrained state.


Muscle insertions determine to what degree a specific muscle can be developed. The easiest examples to illustrate this are the biceps and the calves. Your own biceps are either short, average, or long in length. You can figure this out in two seconds by flexing your bicep with the forearm and upper arm at a right angle. How much space is there in between the end of your biceps and your elbow? If there’s a lot of room there, your biceps are short. In case there’s about an inch of space, consider your muscle length average. On the other hand, if there’s no room at all and your biceps muscle is jammed right up against the elbow joint and it that case you have long biceps.

Having long muscles means that you have more muscle cells to work with and increase the size of.

The calves are the same way, with the two extremes being high and low calves. Flex your calf and see where the muscle ends on its way to your ankle. If it stops not too far down from your knee,  you are unfortunately stuck with high calves. You can beat the crap out of them but they will always be a weak point on your body. If they go way down you are in luck. In fact, you probably have nice calves without even training them.

Every muscle on your body inserts wherever it has been programmed to end up by your particular DNA. All this nonsense about preacher curls being able to ‘fill in’ short biceps is nothing but wishful thinking.

To look like one of today’s top bodybuilders, you must have small joints and long muscles.


In bodybuilding, the smaller your joints are, such as the knees, wrists, and elbows, the better. Tiny joints create the illusion of bigger muscles.

The bone structure is one of the most important category for determining your genetic potential. Just as all architectural masterpieces are, initially, built upon a great structure a great physique begins with the bones on which it is constructed. Bone structure can either make or break a good physique.

The ideal structure for bodybuilding is composed of wide shoulders and a narrow waist. This combination gives the body the V-taper that is highly regarded among bodybuilders.


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