Female and Male Muscles: Are there any differences?

Female and male muscles

A myriad of studies undertaken to examine the differences between male and female muscles have produced informative results. In those studies, scientists discovered that more 3,000 genes are expressed differently between the male and female subjects.

We also know that the genes are often expressed differently because of hormones. Understanding how hormones affect muscle growth between the sexes is, therefore, a primary consideration. Let’s examine the matter in greater detail below.

How Do Muscles Work?

You can think of a muscle as a rubber band. The special muscle fibers expand and contract to produce movement in the skeletal joints of the body and facial expressions. The muscles contract because of nerves activated by the brain and spinal chord that activate muscles called flexors and extensors. And sprint runners often have a special type of fast-twitch muscle fiber that can respond with explosive energy.

People develop muscle memory over time by training their nervous system to activate muscles and muscle groups necessary to perform various activities. This is why it is easier for athletes who lifted heavy weights or performed a particular task in the past to quickly return to their former strength and stamina while inexperienced groups may struggle.

How Do Hormones Affect Muscle Growth?

Testosterone is the main stimulant necessary for muscle growth by producing proteins that aid in muscle development. However, scientific studies have discovered that there are a number of hormones that work together to induce muscle growth and maintain muscle mass.

HGH vs Testosterone .Testosterone isn’t the only hormone that helps build proteins critical to muscle growth. Human Growth Hormone (HGH) is another important component of the endocrine system that, likewise, produces proteins necessary for muscle development.

HGH is regulated by the pituitary gland in the brain. Testosterone is produced in the testes of men and ovaries of women, although men tend to produce higher levels. Both of these hormones tend to diminish as we age from the buildup of senile cells in our bodies that no longer experience mitosis and no longer function to produce them.

Despite the negative stigma of doping with these substances in professional sports, treatments with both HGH and testosterone can be safely administered by a medical professional with little or no side-effects. Ensuring the proper amounts of these hormones in our bodies as we age can help reduce bone fractures, hair loss, fatigue, and other undesirable aspects of aging.

Testosterone is believed to have a strong impact on increasing anaerobic metabolism. However, when used in combination these two synthetic hormones can rejuvenate our aging population by restoring a healthy balance. Testosterone is also associated with increased libido and can improve your love life.


It is well-established that insulin plays a critical role in muscle development. Insulin is needed to supply the muscle tissue with nutrients and energy. It also reduces the breakdown of muscle fibers.

Reducing your intake of sugar and artificial sweeteners can help reduce a problem called insulin resistance that inhibits the function of this hormone. Insulin is used to signal cells to open up and consume the nutrients and energy in the blood. Insulin resistance occurs when the cells become non-responsive from constant stimulation with insulin which is released, in part, when the sweetness receptors of our taste buds are activated.

Insulin-like Growth Factor

New research has developed the theory that insulin-like growth factor-I (IGF-I) plays a critical role in circulating the growth hormones to the muscles for development. While the studies are ongoing and the essential function of IGF-1 is not fully understood, it is important to consult an expert before adding it to any hormone therapy regimen.

How Does Cortisol Affect Muscle Growth?

HGH, testosterone, and the insulin family are hormones that increase anabolic activity in muscle fibers. Cortisol works in the opposite manner by breaking down muscle and inhibiting growth. Cortisol is a catabolic hormone that is released after long cardio workouts and even intense weight-lifting.

Cortisol production also increases when we are under stress and can lead to increased belly fat instead of well-defined abs. However, we still need cortisol because it is necessary to breakdown muscle tissue to rebuild and develop strength.

The secret is to use short and intense exercise sessions instead of prolonged cardio or low-intensity workouts. Keeping your exercise routine to under an hour or breaking it up to a few minutes at intervals during the day produces the best results. Exercising the larger muscles in your legs and compound muscle groups will produce the most testosterone.

Here is an example of a High-Intensity Interval Training workout:

  • Jumping Jacks
  • Heavy Weight Lifting
  • Sprint Running
  • Sprint Swimming Laps
  • Weighted Squats
  • Leg Press

Physical Differences Among Genders

Men tend to have a larger and denser bone structure and a higher lung capacity than women. Women have more estrogen in their bodies, although both sexes have a mix of testosterone and estrogen, explaining the gender fluidity theory. Women also have wider hips and larger breasts that are necessary for child bearing. Men also tend to stand taller and are distinguished by their broader shoulders.

Differences in Muscle Composition

Scientists are still unable to fully understand the reasons why the muscle fibers develop differently between the opposite sexes. However, they have studied some crucial aspects of the muscle characteristics typical to each sex that are very informative.

It turns out that the muscle fibers found in men have a higher capacity for anaerobic metabolism. This is why men typically have a higher power-to-weight ratio and why there is an ongoing debate over the fairness of trans-athletes in sports.

What most people don’t know is that women have an advantage over men when it comes to endurance and recovery. This makes women better suited for a marathon than a comparably trained male subject. And it is common knowledge that men are considerably better suited for strong man contests.


If you are aging, you are likely going through some hormonal changes as your cells become senile and no longer function well. Now that we know how hormones affect our bodies as we age, it is important to take proactive steps to prevent the deterioration of our health that comes inherent to hormone deficiencies. Synthetic hormone therapies can be administered by an expert medical practitioner to extend your life and increase the quality of life. Call us today to schedule an appointment and become the new you, the you of your youth, again.