Muscle fatigue is something that can occur at almost any location in the human body. Muscle fatigue is defined as a reduced ability to generate force. Muscle fatigue is a sensation in which a feeling of tiredness or exhaustion or a need to ret because of lack of energy or strength occurs. Either of these conditions are simply symptoms. Neither are diseases and both are easily cured and adapted. There are two sites of muscle fatigue. These two sites include the following: central fatigue and peripheral fatigue. There are five factors that affect muscle fatigue and performance. These five factors include the following: diet, central nervous system function, strength and skill, environment, and energy production (anaerobic sources/aerobic sources).
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It can cause muscle soreness or delayed onset muscle soreness to occur. Numerous types of mechanisms can cause muscle fatigue and there is not one specific type that is essentially responsibly for all muscle fatigue. It was recently discovered that the accumulation of extracellular potassium is a much larger contributor to muscle fatigue than previously thought (Rockefeller, 2013). These different ways can be anything from the accumulation of metabolites within muscle fibers to the generation of an inadequate motor command in the motor cortex (Enoka & Duchateau, 2007). The mechanisms that cause muscle fatigue are specific to the type of exercise that is performed. Muscle fatigue is sometimes referred to as muscle weakness; however, there is a difference between the two. Muscle weakness is a lack of strength either physical or muscle. Also, with muscle weakness you will feel like extra work is needed to perform your …show more content…
Fatigued muscles contract weaker than rested muscles (Saladin, 2012). This is especially evident when maximum isometric force is measured in repeated tetani and reveals the there is an improved decline that is obvious even on the second tetanus of the series (Allen, Lamb, & Westerblad, 2008). Other parts of muscle performance are altered during fatigue. One such example is the shortening velocity reduction and the time course of slowed relaxation. Almost every activity that humans participate in depends on the power output of the muscles involved and, since power output is the result of both force and shortening velocity, the decrease in performance can be bigger than the decrease in isometric force (Allen, Lamb, & Westerblad, 2008). The decrease in performance is not evident right away during submaximal activity but eventually as fatigue manifests it will cause a person to be unable to be able to continue an activity at the original intensity. This occurrence is commonly known as
It can cause muscle soreness or delayed onset muscle soreness to occur. Numerous types of mechanisms can cause muscle fatigue and there is not one specific type that is essentially responsibly for all muscle fatigue. It was recently discovered that the accumulation of extracellular potassium is a much larger contributor to muscle fatigue than previously thought (Rockefeller, 2013). These different ways can be anything from the accumulation of metabolites within muscle fibers to the generation of an inadequate motor command in the motor cortex (Enoka & Duchateau, 2007). The mechanisms that cause muscle fatigue are specific to the type of exercise that is performed. Muscle fatigue is sometimes referred to as muscle weakness; however, there is a difference between the two. Muscle weakness is a lack of strength either physical or muscle. Also, with muscle weakness you will feel like extra work is needed to perform your …show more content…
Fatigued muscles contract weaker than rested muscles (Saladin, 2012). This is especially evident when maximum isometric force is measured in repeated tetani and reveals the there is an improved decline that is obvious even on the second tetanus of the series (Allen, Lamb, & Westerblad, 2008). Other parts of muscle performance are altered during fatigue. One such example is the shortening velocity reduction and the time course of slowed relaxation. Almost every activity that humans participate in depends on the power output of the muscles involved and, since power output is the result of both force and shortening velocity, the decrease in performance can be bigger than the decrease in isometric force (Allen, Lamb, & Westerblad, 2008). The decrease in performance is not evident right away during submaximal activity but eventually as fatigue manifests it will cause a person to be unable to be able to continue an activity at the original intensity. This occurrence is commonly known as