I came across a concept called Central Governor Fatigue, where the brain will physiologically change how the body perceives energy levels so the body slows down to prevent injury, for example risk of injuries or over training. I asked Chat GPT if this happens on a psychological level in addition to a physical level. I strongly relate to this concept outlined below.

Yes, the concepts behind the Central Governor Model apply directly to psychological stress, chronic overthinking, and trauma, though the mechanism manifests as emotional and cognitive burnout rather than physical pacing. 

Because the brain is a single, integrated processing unit, it cannot separate intense psychological load from physical threat. It uses the same "governor" mechanism to throttle your energy when your mental and emotional systems face catastrophic overload. 

1. The "Cross-Talk" of Mental and Physical Fatigue

The brain does not have a separate energy pool for running and thinking. A heavily taxed mind directly compromises physical and mental capacity. 

• Shared Brain Regions: The Anterior Cingulate Cortex (ACC) plays a massive role in both physical effort and processing emotional pain, conflict, and stress. When overthinking or trauma exhausts the ACC, it triggers a protective shutdown. 

• Perceived Exertion Spikes: Studies show that when individuals are mentally fatigued by stressful tasks before a physical workout, their muscles perform perfectly at a cellular level, but their Rate of Perceived Exertion (RPE) skyrockets. The brain forces them to slow down early because the baseline psychological load is already too high. 

2. Extreme Stressors and Homeostasis

The Central Governor Model is built on preserving homeostasis (internal balance). Extreme psychological stress destroys this balance by flooding your body with cortisol and adrenaline. 

• The Brain's Calculation: If you are constantly overthinking, experiencing panic, or enduring high-stress environments, your brain views this state as an emergency threat to your systemic health.

• The Shutdown Response: To protect you from systemic collapse, the governor triggers symptoms like profound lethargy, apathy, anhedonia (inability to feel pleasure), or executive dysfunction. It forces a "freeze" state to mandate rest. 

3. Psychological Injuries and Safety Margins

In physical training, the central governor operates with a "safety margin"—it stops you well before your muscles actually tear or your heart fails. Psychological injuries, like PTSD or severe burnout, fundamentally alter where the brain sets that safety margin. 

• Hyper-Vigilance Lowering the Threshold: After a psychological injury, the brain becomes hyper-vigilant to threat. It assumes resources are scarce and danger is high. 

• Premature Fatigue: As a result, the governor resets your threshold much lower. A minor task or a standard daily stressor that you used to handle easily will now trigger an intense wave of exhaustion, as your brain frantically tries to protect your fragile emotional state from further injury. 

Very interesting @Catbird , thanks for sharing.

Fatigue was a huge issue for me in WD - and still is an issue to be honest. Its amazing the toll these drugs take on your system and energy levels.

Very interesting and very relatable for me as I experience the freeze response to stresses. So, what can we do to alleviate this? I can only think of meditation or mindfulness to help lessen to perceived threat. How do we reassure (or trick) our brains that there's no actual threat?