Fatigue - Human Antiaging Center

Fatigue is a term used to describe an overall feeling of tiredness or lack of energy. It can have both physical and mental components. Physical fatigue refers to the body's inability to continue functioning at its normal level of activity due to prolonged exertion. As we engage in physical activity, our muscles begin to run low on adenosine triphosphate (ATP) - the key source of energy. Lactic acid also builds up faster than it can be removed. All this leads to temporary reduced muscle power and performance. Some key things to know about physical fatigue:

• It's a protective mechanism to prevent damage from overexertion. Forcing fatigued muscles to continue can cause muscle strain or tears.
• It's often felt as heavy limbs, muscle soreness, or a lack of endurance.
• It can be caused by intense physical exercise, physical labor, illness, or poor nutrition/hydration.

Mental fatigue, on the other hand, affects concentration, motivation and mood. It stems from prolonged periods of cognitive activity that drain our mental resources. Common causes include:

• Working for long hours without breaks
• Sleep deprivation
• High stress

The symptoms of mental fatigue include:

• Difficulty concentrating or focusing
• Reduced motivation
• Increased irritability
• Headaches
• Fatigue despite having enough rest

To summarize, fatigue is the body and brain signaling its need for rest and recovery. It serves an important biological function but can impede performance. Managing fatigue by allowing sufficient sleep, taking breaks, eating healthy foods and incorporating rest days into exercise routines can help optimize physical and mental energy levels.