About this episode
This 9 to 5 Wellness podcast episode we're reframing skeletal muscle as a highly active organ with major roles beyond movement. You'll learn muscles role as the body’s primary “glucose sink,” taking up an estimated 70–80% of post-meal glucose via insulin-driven GLUT4 and storing large glycogen reserves, with inactivity, aging, and metabolic disease contributing to insulin resistance.
Muscle is also an “energy furnace” that raises basal metabolic rate, supports thermogenesis (including shivering), and declines with sarcopenia, contributing to metabolic slowdown. Moreover you can learn about muscles role as an amino acid reserve used during fasting, illness, trauma, surgery, and cachexia, influencing outcomes.
It is also the largest endocrine organ, releasing myokines (e.g., IL-6, irisin, BDNF, IL-15, myostatin) that signal to the brain, fat, liver, bones, and immune system, with benefits from moderate, consistent activity.
00:00 Welcome and Teaser
00:32 Muscle Beyond Movement
01:47 Glucose Sink Explained
04:58 Blood Sugar and Exercise
07:13 Muscle as Calorie Furnace
10:55 Heat and Metabolic Aging
13:18 Emergency Protein Bank
17:58 Muscle as Endocrine Organ
19:31 Key Myokines Breakdown
25:21 Big Picture and Takeaways
27:49 Wrap Up and Motivation
Related Research Studies
Skeletal Muscle as an Endocrine Organ
Muscle as an endocrine organ: IL-6 and other myokines
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My passion is helping organizations create a culture of wellness, and I do this by setting up health programs that prioritize the most important asset they've got – their employees. Cheers to a healthier and happier journey ahead!
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