Jonathan Hartman retweetledi
Your muscles do more than move you; they communicate.
Here’s how this muscle–brain conversation works
1️⃣ Muscles Release Myokines When You Move
Every time you contract a muscle — whether walking, lifting, or cycling — your body releases myokines into the bloodstream.
These molecules travel to the brain, heart, liver, and other organs, fine-tuning metabolism, immune function, and repair.
🟢 Think of myokines as your muscles’ “text messages” to the rest of your body.
2️⃣ Myokines Protect and Energize the Brain
Different myokines perform specialized jobs:
BDNF (Brain-Derived Neurotrophic Factor): Grows new neurons and strengthens existing connections — essential for learning and memory.
IGF-1 (Insulin-Like Growth Factor 1): Supports neuron survival and brain plasticity.
VEGF (Vascular Endothelial Growth Factor): Builds new blood vessels to deliver oxygen and nutrients.
Irisin: Regulates brain metabolism and reduces inflammation.
IL-6: Signals energy balance and helps modulate the immune system.
🟢 Example: Regular aerobic training increases BDNF, which correlates with improved memory and cognitive function.
3️⃣ Different Exercises Trigger Different Myokines
The type of exercise you do shapes your myokine profile:
Aerobic training (e.g., running, cycling): Broadly increases BDNF, VEGF, and CATB — boosting neuroplasticity and blood flow.
Resistance training: Elevates IGF-1 and IL-6 - improving muscle strength, insulin sensitivity, and energy regulation.
Combined or HIIT training: Merges both effects - supporting endurance, cognition, and metabolic health.
🟢 Example: 12 weeks of mixed aerobic and resistance training enhanced memory and energy metabolism in older adults.
4️⃣ Myokines Slow Aging from the Inside Out
With age, myokine release declines, contributing to weaker muscles and slower brain function.
Exercise restores this molecular communication - improving mitochondrial health, reducing oxidative stress, and protecting against neurodegenerative disease.
🟢 Studies show that consistent physical activity can delay Alzheimer’s- and Parkinson’s-related changes via myokine signaling.
5️⃣ Why It Matters
This science reframes muscle as more than a mechanical tissue — it’s an endocrine organ that speaks to the brain.
Through myokines like BDNF, IGF-1, and irisin, every workout sends signals that promote growth, repair, and longevity.
🟢 In simple terms: when you move your body, you literally feed your brain.
Exercise isn’t just about strength. It’s about communication.
Your muscles release molecular messengers that protect your brain, balance your metabolism, and slow the biological clock.
Movement isn’t just medicine; it’s messaging for longevity.
English
