Physiology
Central Nervous System (CNS)
Also written: CNS, central nervous system
Your brain and spinal cord: the control center that tells your muscles what to do.
Strength is partly a skill your nervous system learns. Heavy lifting and all-out sprints are demanding on the , which is one reason they need more rest than lighter work.
“CNS fatigue” gets blamed for a lot online; most tiredness after training has more ordinary causes like sleep and food.