NIFS Healthy Living Blog

Hormones have an especially important role in dealing with resistance training. The endocrine system is a collection of glands that produce hormones that regulate metabolism, growth and development, tissue function, sexual function, sleep, and mood. Some of these hormones are anabolic, which promote tissue building, and others are catabolic, which are used to degrade/break down cell protein. Ideally for muscle building, it is important to produce anabolic hormones while limiting the production of catabolic ones.

Anabolic and Catabolic Hormones

Scientists have identified examples of anabolic hormones in the human body. These examples include insulin, IGF-1 (insulin-like growth factor), testosterone, and growth hormone. On the other hand, the catabolic hormones are cortisol, catecholamines, and progesterone. For our purposes, we can focus on two of these hormones: testosterone and cortisol.

Testosterone

Testosterone is the primary androgen hormone. The way to promote testosterone is short rest periods, 30 to 60 seconds, heavy resistance—85 to 95 percent 1RM (large motor units), and chronic resistance training (2+ years). Further, testosterone has a known effect on the nervous system: it increases neurotransmitters, and it acts on every tissue in the body. Men have 15 to 20 times more testosterone than women, and acute, or sudden, increases following workouts are small.

Cortisol

Cortisol, on the other hand, converts amino acids into carbs and breaks down proteins and inhibits the synthesis of proteins, which is bad if you are trying to build muscle because proteins are the building blocks for muscle. Cortisol increases during exercise with high volume/short muscle rest, causing large serum cortisol. This does more damage to the muscle and is not good for muscle recovery. Chronically high cortisol levels have adverse catabolic effects.

Knowing that your body produces both testosterone and cortisol, the difficulty lies in the ability to produce more testosterone than cortisol to see muscle growth.

Ways to Promote Lower Cortisol Levels

Here are four ways to lower your cortisol levels so that you can build muscle:

• Utilize proper rest times during high-intensity resistance workouts.
• Eat enough protein and carbohydrates to help you through the resistance workout.
• Perform resistance workouts when your body’s cortisol levels are lower, typically later in the day.
• Make sure you are getting enough sleep.

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Make sure you are paying attention to your hormones during resistance exercise. If you are not careful, hormones might be affecting your gains in a negative way instead of a positive way. As you can see from this information, these are just a few areas you can target to start producing testosterone and therefore, affect the tissues within your body. Hopefully, this information gives you a better understanding of the main two types of hormones, anabolic and catabolic, how they work in your body, and ways to achieve those gains you are looking for in your resistance training.

Source: Haff, G., & Triplett, T. (2016). Essentials of Strength Training and Conditioning (4th ed.). Human Kinetics.

This blog was written by David Behrmann, NIFS Health Fitness Instructor.To learn more about the NIFS bloggers, click here. 

Science News (August 9, 2021) reported a study released by the University of Kentucky College of Medicine and College of Health Sciences that adds to the growing evidence that resistance training has unique benefits for fat loss. As a longtime fitness trainer, I have known about the effectiveness of resistance training for fat loss and body composition from my experience with clients and my own personal health and fitness journey. However, it is interesting to see science finally start to catch up with the real world and offer up some details of human physiology and systems biology as evidence as to why resistance training is so effective.

The Science

This study showed that in mice and in humans, in response to mechanical loading, muscle cells release particles called extracellular vesicles. These extracellular vesicles instruct fat cells to enter fat-burning mode.

It has been understood for a while that extracellular vesicles played a role in selectively interacting with proteins, lipids, and RNA and more recently had a role in intercellular communications. This study adds to that understanding by showing how skeletal muscle communicates with other tissues.

According to McCarthy, “To our knowledge, this is the first demonstration of how weight training initiates metabolic adaptations in fat tissue, which is crucial for determining whole-body metabolic outcomes. The ability of resistance exercise-induced extracellular vesicles to improve fat metabolism has significant clinical implications.”

What It Means for You: Resistance-based Training Is a Fat-loss Tool

Well, that was science-speak, but what does this mean to you? “Significant clinical implications” means that the research provides clinicians with findings that can be used in treating medically needed fat loss with resistance-based training along with diet and other forms of exercise, such as cardiovascular training. 

Fitness in the US Is Declining

Our culture is getting heavier, with a rising percentage of the population crossing over to obesity. Recent studies have shown that 88 percent of the adult American population is metabolically unfit, with expected conditions that include high blood pressure, heart disease, and diabetes. And Covid showed us clearly that metabolic unfitness was associated with bad Covid experiences and poor outcomes, including death. (Oh, and by the way, American life expectancy has been trending down even before Covid.)

Whatever we are doing as a culture is not working for health and longevity. Changing these adverse conditions requires changes at the individual level because large parts of our social fabric (business, media, and special interests) are too wrapped up in greed and maintaining the status quo for their interests and not acting for the greater good. So it’s up to each individual to decide what is best for their own health regarding diet, exercise, sleep, and stress reduction. All four of these factors are all very important, but exercise and diet seem to get the most attention and are the places where most people start their journey of making life-quality changes.

Where Do You Begin Your Fat-loss Journey?

“Experts” are all over the media with supplements, books, and podcasts. The number of theories and opinions is staggering. Most seem reasonable on the surface, which adds to the confusion about what to choose and where to start.

Adding to the complexity, huge international corporations, through massive advertising campaigns, are marketing online workout programming to support a major purchase of their in home exercise equipment. They offer cardio equipment and digital-controlled strength machines—slick and attractive to someone sitting on the couch with pizza and a beer.

And your online fitness searches provide social media marketing the information they need to dump even more choices in your lap based on what you have been viewing online. Hmm…

Confusing? Overwhelming?

Let’s erase the messy whiteboard and create a simpler view of the objective.

Remember, I started this blog with a study that showed how resistance training sets the cells up for burning body fat. The purpose of sharing this study was to support the concept of resistance training as an effective method for fat loss and an approach you should consider seriously.

A Training Template for Fat Loss

The following is a straightforward template to serve as a starting point to begin your resistance training/fat-loss exploration.

The human body has six patterns of functional movement:

1. The body sits down and stands back up. The knees and hips flex and extend. In the gym, we see this in various forms of squatting, lunging, and step-ups.
2. The body hinges at the hip joints and bends down to pick up things using the largest and strongest muscle complex of the body, the glutes. In the gym, this could be deadlifting on one end of the spectrum to lying on your back on a mat, knees up and feet on the ground for doing hip thrusts. (Both the squat and deadlift techniques should be taught by a competent coach to speed the acquisition of proper skills and to avoid injuries).
3. While standing, if you hold your arms out in front of your body, the arms would be horizontal  to the ground. This right angle to the spine position is called the horizontal plane. If you were doing a push-up facing the ground or lying on your back doing a chest press, the arms would still be at a right angle to the spine, thus on the horizontal plane. The arm movement on this plane would either be pushing away from the body (for example, the bench press) or pulling back toward the body (for example, the back row). There are numerous options to choose from for working on this plane.
4. When the arms move in line with the spine, this is the vertical plane, and once again you are either pushing away (for example, the shoulder press) or pulling toward the body (for example, the lat pulldown or pull-up). The horizontal and vertical push/pulls cover the basic functional movement patterns of the upper body. When done standing, the core ties the lower- and upper-body segments into a functional unit for expressing strength and power.
5. The core is an important component of the basic workout template. As indicated above, the core ties together the lower- and upper-body segments, but also serves to stabilize and protect the lumbar spine.
6. A forgotten and often overlooked exercise that is key to a strong-functioning body is the carry. As simple as it sounds, you pick up something and carry it: moving weight for distance and/or time. This exercise brings together strength, balance, muscular endurance, and grip strength.

There are numerous exercises to choose from to fill in the slots of the template: various reps and sets schemes, frequencies of sessions, recovery days and resistance sources depending on what best meets the needs of the individual, but having a structure to work with is critical for success, especially at the beginning.

You can certainly explore and experiment on your own, but I recommend that you take advantage of the trained professionals here at NIFS. There is a lot of knowledge and experience available to help you on your journey. We are here to assist you—just ask.

This blog was written by Rick Huse, NIFS Health Fitness Specialist. To find out more about the NIFS bloggers, click here.