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Muscle fatigue is not the same as muscle weakness, though weakness is an initial symptom. Despite a normal amount of force being generated at the start of activity, once muscle fatigue has set in and progressively worsens, if the individual persists in the exercise they will eventually lose their hand grip, or become unable to lift or push with ...
After such exercise, the muscle adapts rapidly to prevent muscle damage, and thereby soreness, if the exercise is repeated. [1] [2]: 76 Delayed onset muscle soreness is one symptom of exercise-induced muscle damage. The other is acute muscle soreness, which appears during and immediately after exercise.
Until second wind is achieved (increased ATP production primarily from free fatty acids), the symptoms of a low ATP reservoir in exercising muscle due to depleted glycogen include: muscle fatigue, muscle cramping, muscle pain , inappropriate rapid heart rate response to exercise (tachycardia), breathlessness or rapid breathing , exaggerated ...
[50] [51] Rather, lactate may stop muscle fatigue by keeping muscles fully responding to nerve signals. [52] The available oxygen and energy supply, and disturbances of muscle ion homeostasis are the main factors determining exercise performance, at least during brief very intense exercise.
The Canadian Consensus Criteria require "post exertional malaise and/or [post exertional] fatigue" instead. [21] [22] [23] [19] [24] On the other hand, the older Oxford Criteria lack any mention of PEM, [25] and the Fukuda Criteria consider it optional. Depending on the definition of ME/CFS used, PEM is present in 60 to 100% of ME/CFS patients. [6]
Abnormal muscle fatigue (premature fatigue and/or inability to get into second wind), muscle pain (myalgia), cramping or muscle stiffness during and/or after exercise, [citation needed] Shortness of breath ( dyspnea ), or rapid breathing ( tachypnea ), or heavy breathing ( hyperpnea ), or both (exercise hyperventilation ) [ citation needed ]
Exertional rhabdomyolysis, the exercise-induced muscle breakdown that results in muscle pain/soreness, is commonly diagnosed using the urine myoglobin test accompanied by high levels of creatine kinase (CK).
Exercise intolerance is a condition of inability or decreased ability to perform physical exercise at the normally expected level or duration for people of that age, size, sex, and muscle mass. [1] It also includes experiences of unusually severe post-exercise pain , fatigue , nausea , vomiting or other negative effects.