09/22/2026
🧠 Social Media Post — Exercise Science Explained #2
EXERCISE SCIENCE EXPLAINED | #2: MOTOR UNITS
Ever wonder how your brain actually tells your muscles to move? 🧠💪
It all starts with motor units.
A motor unit is made up of one motor neuron and all the muscle fibers it controls.
When you need to produce force:
➡️ Your brain sends a signal
➡️ The motor neuron carries that signal
➡️ Muscle fibers contract
➡️ Your nervous system recruits additional motor units as more force is needed
This is one reason strength training isn't just about building bigger muscles. Your nervous system also becomes better at coordinating and recruiting the muscle fibers you already have.
And that matters for strength, power, athletic performance, and movement.
That's the science behind the work we do at SCC Fitness.
Know More. Train Smarter. Be Stronger. 💪