In this episode of On Purpose with Jay Shetty, Dr. Gabrielle Lyon explains how muscle health affects longevity and disease prevention. She presents evidence that muscle acts as a metabolic control center and challenges common beliefs about obesity and diabetes, suggesting that poor muscle health—rather than body fat alone—contributes to these conditions.
The discussion covers practical approaches to building and maintaining muscle mass, including specific protein intake recommendations and exercise strategies. Lyon and Shetty address common mental barriers that keep people from prioritizing muscle health, while exploring how proper nutrition and consistent resistance training can support both physical and mental well-being as we age.

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Gabrielle Lyon discusses how muscle health significantly impacts longevity and disease resistance. She emphasizes that muscle is the only system we can consciously control and build, making it crucial for overall health. According to Lyon, muscle acts as a metabolic control center, regulating glucose and triglycerides, which helps prevent diseases like diabetes, cardiovascular disease, and Alzheimer's.
Lyon challenges conventional wisdom by asserting that unhealthy skeletal muscle, rather than body fat alone, is at the root of conditions like obesity and diabetes. She warns against traditional calorie restriction and weight loss medications, as they can lead to muscle loss and potentially worse health outcomes.
In their discussion, Lyon and Jay Shetty address the mental barriers that prevent people from prioritizing muscle building. Lyon emphasizes that feelings of unworthiness or being too old are merely distractions from one's health journey. She advocates for a consistent, steady approach to exercise rather than relying on sporadic bursts of motivation.
Shetty notes how cultural preoccupation with weight loss can overshadow the importance of muscle building. Lyon responds by highlighting that muscle building is more controllable than fat loss and contributes to both physical and mental well-being.
Lyon outlines specific strategies for optimal muscle health, recommending at least 45 grams of protein for breakfast to support muscle protein synthesis. She emphasizes the importance of whole food protein sources and advises against fasting for more than eight to nine hours to protect muscle mass.
For exercise, Lyon recommends consistent resistance training, which can include bodyweight exercises, weights, or bands. While 10,000 daily steps can maintain basic muscle fibers, she stresses that effortful resistance training is essential for maintaining type two muscle fibers, which naturally diminish with age. She suggests starting with manageable exercises and gradually increasing intensity, combining this with appropriate protein intake for optimal results.
1-Page Summary
Gabrielle Lyon highlights the significance of muscle health in longevity and how it impacts resistance to diseases.
Lyon emphasizes the importance of muscle as a vital organ for longevity, suggesting that individuals who are stronger in midlife have better chances of living longer. She states that muscle is the only system that we have full control over and can consciously add to. Muscle health contributes to overall resilience, and Lyon associates strong muscles directly with a longer lifespan. "To really make that connection for everyone today, that muscle is strength. And strength is necessary for longevity and to beat disease," she says.
Skeletal muscle acts as a metabolic control center and is directly linked to the regulation of glucose and triglycerides. This regulation is critical in preventing diseases like diabetes, cardiovascular disease, and Alzheimer's (referred to as type 3 diabetes of the brain). The health of muscle affects amino acid reserves, carbohydrate and fatty acid metabolism, and releases myokines which influence various body parts, including the brain and liver. Muscle stores carbohydrates and fatty acids, helping to prevent them from remaining in circulation and leading to metabolic derangement and increased body fat.
Lyon states that unhealthy skeletal muscle is a root cause of conditions like obesity, diabetes, and cardiovascular disease. These diseases are, at their core, diseases of metabolism. When muscle gains fat, it becomes unhealthy, impacting the body's ability to manage metabolic diseases. This underscores muscle health's importance over obesity, as we do not feel when our muscles become unhealthy.
Lyon contends that diseases are rooted in unhealthy muscle, not just excess fat. Skeletal muscle is crucial for fertility, particularly regarding PCOS ...
Muscle Health's Role in Longevity and Disease Prevention
The discourse of Lyon and Shetty circles around the mental adjustments and habitual consistency necessary for prioritizing muscle building. Their dialogue unpacks the empowering qualities of muscle development and the importance of establishing a consistent exercise regimen.
Lyon advocates for muscle-building as an empowering action, contrasting it with the passive nature of other bodily functions. She underscores that feelings of unworthiness, being too old, or past failures are merely distractions that mustn't curb one’s health journey. It's crucial to exercise discernment over which thoughts to act upon, cultivating the discipline to build upon empowering thoughts that drive progress.
Shetty and Lyon talk about the cultural preoccupation with obesity and weight loss over muscle building. Shetty brings up how aesthetics related to weight can overshadow the importance of muscle, noting that common misconceptions about physical appearance can obstruct one’s commitment to muscle development.
Lyon states building muscle is controllable and within an individual's influence, unlike the unpredictable nature of losing fat. Emphasizing the positive implications of muscle-building for mental and physical health, she contends that taking action to build muscle induces a confident and effective mindset.
Lyon suggests that individuals must feel worthy of being healthy and that excuses such as being too old or too busy are unfounded. Shetty adds that building good habits at a young age is instrumental and compares it to the challenge of undoing years of bad habits. Lyon motivates people to challenge the claims of age being a barrier to health, highlighting the necessity of consistent health efforts.
Consistency in muscle-building activities is fundamental, as it surpasses the impact of irregular efforts, according to Lyon. She also argues that individuals should implement a consistent program of resistance training, starting with two to three sessions a week, to see progress.
Mindset and Behavior Changes For Muscle Building Prioritization
Gabrielle Lyon and Jay Shetty offer insights into optimized strategies for muscle building and maintenance, highlighting the crucial role of nutrition and exercise.
Gabrielle Lyon suggests that the first meal of the day is crucial for protein intake, recommending a substantial amount typically 45 grams or more, depending on the individual's size. This high protein breakfast can increase satiety, stabilize blood sugar levels, and is particularly important for muscle protein synthesis, especially as one ages. Lyon points to specific amino acids like leucine, which are needed in approximately two and a half grams to trigger muscle synthesis. She mentions that each amino acid performs various functions, highlighting the diverse roles of these building blocks beyond just muscle synthesis.
Lyon emphasizes the importance of consistency in protein intake and advises against fasting for more than an eight- to nine-hour window to protect muscle mass. She encourages focusing on whole foods for quality protein sources, like whey, fish, chicken, eggs, or dairy, and advises caution with protein-rich processed foods, which might just add extra calories without quality nutrients. A balanced dietary protein habit is essential for muscle protection, emphasizing whole foods over supplements, and consistently including key amino acids in diet plans to support muscle health.
Lyon explains that building muscle can be achieved through resistance training, which can include bodyweight exercises, weights, or bands—essentially anything that involves moving the body against resistance. The conversation does not explicitly compare high weight vs. low weight but emphasizes finding a balance that provides enough stimulus to the body's tissues.
While the discussion doesn't specify HIIT, walking, or yoga, Lyon acknowledges that any kind of resistance training is necessary for building and maintaining type two muscle fibers, which diminish with age. Ten thousand steps a day may maintain type one fibers, but for type two fibers, effortful resistance training is paramount. Yoga an ...
Nutrition and Exercise Strategies For Muscle Building and Maintenance
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