Chapter 1
The secret hormone factory in your arms and legs
Chapter 2
The ultimate blood sugar shield
Chapter 3
Sarcopenia and the structural armor
Chapter 4
The muscle-brain-immune connection
Ch 4 · The muscle-brain-immune connection
doctorx Muscle Preservation for Longevity
We squeeze the muscle to send the signals that protect the brain.
doctorx This direct muscle-to-brain pathway delivers irisin across the blood-brain barrier to stimulate protective proteins, reducing the risk of Alzheimer's.
Quiz
Which muscle-derived myokine is famous for its ability to cross the blood-brain barrier and protect brain health?
Quiz
What neurological condition shows a significantly lower risk of development in individuals who exercise regularly?
doctorx Exercise-induced neuroplasticity improves memory and protects your mind as you age.
Quiz
What is the primary role of Brain-Derived Neurotrophic Factor (BDNF) in the human nervous system?
Fun Fact
Brain fertilizer: BDNF is so powerful for brain growth that scientists often refer to it as 'Miracle-Gro for the brain'.
Quiz
What is the medical term for the gradual deterioration of the immune system associated with aging?
Quiz
Which immune cells are directly mobilized and supported by the muscle-derived myokine IL-15?
Glossary
myokine (noun)
A signaling molecule synthesized and released by muscle fibers during muscular contraction. A 2025 Cell Metabolism study detailed how these molecules coordinate signaling between active tissue and the brain.
A signaling molecule synthesized and released by muscle fibers during muscular contraction. A 2025 Cell Metabolism study detailed how these molecules coordinate signaling between active tissue and the brain.
Quiz
How many times per week does health science recommend performing resistance training to preserve muscle mass?
Quiz
What dietary strategy is most effective for stimulating muscle protein synthesis throughout the day?