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What if strength isn’t just physical, but emotional and cultural too?

Award-winning journalist Bonnie Tsui, author of Why We Swim and On Muscle, explores how our muscles tell the story of who we are — our adaptability, creativity, and joy in motion.

On this episode of The Ready State Podcast, Juliet and Kelly Starrett sit down with Bonnie to unpack how muscle links the brain and body and reshapes how we think about strength, beauty, and being alive.

• Why muscle is more than physical strength — it’s an endocrine organ that communicates with the brain.
• How Bonnie’s unconventional childhood shaped her lifelong fascination with the body.
• The cultural myths that still shape how we view women’s bodies and power.
• Why play and access to movement are essential across every stage of life.
• How muscle’s adaptability makes it a symbol of hope and renewal.
• The one simple practice Bonnie recommends for everyone: “Lift something heavy for you”

(00:00) - Intro

(01:25) - Importance of Muscle

(03:52) - Parental Influence on Fitness

(07:56) - Debunking Muscle Myths

(12:35) - Understanding Muscle Physiology

(15:52) - Surprising Facts About Muscle

(18:50) - Women and Muscle Development

(23:15) - Trends in Women's Fitness

(27:38) - Access and Inclusion in Fitness

(30:11) - Resilience of Muscle Tissue

(31:13) - Muscle Regeneration Process

(32:44) - Interview with Matthew Sanford

(37:10) - Curiosity in Muscle Science

(43:28) - Daily Muscle Care Tips

(45:47) - Closing Remarks

(47:14) - Bonnie adds a book to our Infinite Shelf

(48:00) - Connecting with Bonnie

This episode of The Ready State Podcast is brought to you by LMNT and Momentous.