Summary
Highlights
Many believe muscle growth is solely about high testosterone and protein intake, but Dr. Nash Yosich, a former bodybuilding champion, reveals a 'forgotten hormone' that is the real driver. He explains that even with high testosterone and protein, one might not grow if this hormone is not optimized. For over 40 years, Dr. Yosich has coached thousands and published 11 ebooks on muscle growth, fat loss, and training systems, emphasizing that the body's internal environment is paramount.
Many men over 40 struggle to build muscle despite intense training and high protein diets. This is because their hormonal environment works against them. Modern fitness often wrongly focuses on testosterone boosters, excessive protein, calorie calculators, and eating more, neglecting the crucial hormonal balance. These common approaches often fail because they don't address the underlying metabolic state required for muscle growth, leading to frustration and stagnation.
The 'forgotten hormone' is insulin. While chronically elevated insulin can be destructive, insulin is actually the master anabolic hormone, directing nutrients to either muscle or fat. Muscle growth is highly dependent on insulin sensitivity, meaning cells readily absorb glucose and amino acids. An optimal hormonal environment also requires low stress and low cortisol. Loss of insulin sensitivity, common in those over 40, leads to poor nutrient uptake, slow recovery, increased inflammation, and reduced testosterone effectiveness.
Muscle hypertrophy can be visualized as a three-layered pyramid. The base is the metabolic environment (insulin sensitivity). The middle layer consists of recovery and growth hormones like testosterone, growth hormone, and nitric oxide. The top layer includes protein, calories, and supplements. Many people mistakenly invert this pyramid, focusing on the top layer without a solid foundation, which hinders growth. Proper sequencing, starting with a healthy metabolic environment, is crucial for sustained muscle building.
Three main factors destroy insulin sensitivity with age: 1) High-carb diets and constant snacking, which chronically elevate insulin levels. 2) Constant stress, leading to high cortisol levels, an anti-muscle hormone that breaks down muscle for energy. 3) Lack of deep sleep (less than 7-9 hours), which negatively impacts hormonal balance. When cortisol and insulin are consistently high, and sensitivity is low, the body enters a 'muscle building dead zone'.
To leverage insulin for muscle growth, focus on low baseline insulin and high insulin sensitivity. This involves eating 2-3 protein-dominant meals daily with low carbohydrates, ideally consuming carbs only post-workout. Mornings should be fasted or very low insulin to enhance fat burning and sensitivity. Training should be high-volume with a focus on tension, not just heavy weights, as this stimulates metabolic health and muscle growth. Low-carb or no-carb diets are recommended on non-training days.
On non-training days, prioritize very low-carb (or no-carb) meals with high protein and healthy fats. Incorporate 45-60 minute outdoor walks at a medium pace. These walks improve insulin sensitivity, lower cortisol, reduce stress, and, importantly, boost nitric oxide production. Breathing through the nose during walks is key, as paranasal sinuses produce nitric oxide, enhancing oxygen absorption. High-volume workouts also stimulate nitric oxide production in arterial cells, increasing vascular flexibility and overall metabolic health.
To assess your insulin sensitivity, ask yourself: Do you feel sleepy after meals? Do you store fat around your waist? Do you feel weak on high-carb diets? Do you crash without carbohydrates? A 'yes' to these indicates low insulin sensitivity and potential insulin resistance. Bodybuilding is about creating a body ready to grow by fixing the metabolic environment, rather than just increasing food intake or focusing solely on proteins.
Muscle growth is achievable at any age by optimizing the metabolic environment. Dr. Nash Yosich offers 11 ebooks covering detailed explanations of bodybuilding topics, accessible via a link in the comments. He also provides personalized coaching, nutritional programs, and consultations for individuals looking to get into the best shape of their lives. Viewers are encouraged to subscribe, like, share, and comment on the video.