Understanding Muscle Mass and Strength: Metrics and Insights

In this episode, I discuss the essential role of skeletal muscle in health and performance. I explain what skeletal muscle is made of, how it works, and its role as an integral organ system for physical and mental health. I explain how to focus on skeletal muscle quantity (total muscle) and muscle quality (functionality, speed, power, strength) to ensure you function and perform at the highest levels.

I explain the difference between slow- and fast-twitch muscle fibers and why skeletal muscle is uniquely adaptable to exercise, nutrition, and lifestyle factors. I also explain why resistance training becomes increasingly critical for healthy aging and disease prevention.

I explain how to use the "Three Is" of investigate, interpret, and intervene to determine if you have enough muscle, if it's functioning well, and protocols to improve muscle quality and quantity. Listeners of this episode will understand why skeletal muscle is so essential to care for and how to enhance muscle quantity and quality to optimize physiology, performance, and longevity.

Access the full show notes for this episode, including referenced articles and additional resources, at performpodcast.com.

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Timestamps

00:00:00 Skeletal Muscle

00:04:06 Sponsors: Absolute Rest & Momentous

00:07:20 Quantity & Quality; Organ System; Health & Performance

00:12:58 Plasticity, “Look Good, Feel Good, Play Good”; Muscle Types

00:15:46 What is Muscle?, Muscle Fibers, Tendon

00:21:37 Muscle Fiber Number, Hyperplasia, Anabolic Steroids, Age

00:24:03 Myonuclei & Adaptability

00:26:27 Muscle Fiber Types, Variable Muscle Functions

00:32:24 Fiber Type & Lifestyle Factors

00:34:54 Sponsors: David Protein & AG1

00:37:37 Age & Muscle Loss, Slow vs. Fast-Twitch Fibers; Motor Units

00:46:36 Muscle Size vs. Muscle Strength, Quantity vs. Quality

00:50:56 Investigate: Muscle Quantity, Fat-Free Mass Index (FFMI)

00:56:21 FFMI, Elite Athletes, Muscle Mass

01:00:59 Muscle Asymmetry; Too Much Muscle Possible?

01:03:49 Interpret: Muscle Mass, FFMI Calculations & Percentiles

01:09:28 Tool: Intervene - Increase Muscle Mass, 72-Hour Rule

01:15:27 Sponsors: Maui Nui & Renaissance Periodization

01:17:51 Investigate: Muscle Quality & 4 Movement Principles

01:23:34 Muscle Quality & 3 Performance Principles

01:26:42 Interpret: Muscle Speed, Age

01:32:45 Muscle Power, Vertical Jump, Broad Jump

01:36:17 Muscle Strength, Powerlifting Elite, Bench Press, Leg Press, Grip Strength

01:44:05 Increasing Strength, Improve Health & Longevity

01:46:44 Tool: Intervene - Improve Muscle Quality, 4 Training Principles, 3-to-5 Rule

01:53:56 Zero-Cost Support, YouTube, Spotify & Apple Subscribe & Reviews, Sponsors, YouTube Feedback, Social Media

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