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The combination of an inappropriate rapid heart rate response to exercise with heavy or rapid breathing is known as an exaggerated cardiorespiratory response to exercise. [3] Due to the confusion between muscle fatigue and muscle weakness, there have been instances of abnormal muscle fatigue being described as exercise-induced muscle weakness.
Central nervous system fatigue, or central fatigue, is a form of fatigue that is associated with changes in the synaptic concentration of neurotransmitters within the central nervous system (CNS; including the brain and spinal cord) which affects exercise performance and muscle function and cannot be explained by peripheral factors that affect muscle function.
One of the first definitions of ME/CFS, the Holmes Criteria published in 1988, does not use the term post-exertional malaise but describes prolonged fatigue after exercise as a symptom. [7] The term was later used in a 1991 review summarizing the symptoms of ME/CFS.
The CPET test measures exercise capacity and help determine whether the cause of exercise intolerance is due to heart disease or to other causes. [3] People who experience significant fatigue before reaching the anaerobic threshold usually have a non-cardiac cause for exercise intolerance. [3]
Example ultrasound of an athlete. Athlete's heart most often does not have any physical symptoms, although an indicator would be a consistently low resting heart rate.. Athletes with AHS often do not realize they have the condition unless they undergo specific medical tests, because athlete's heart is a normal, physiological adaptation of the body to the stresses of physical conditioning and ...
Individuals may feel "physically drained" and unable to start or finish activities. They may also feel restless while fatigued, describing their experience as "wired but tired". When starting an activity, muscle strength may drop rapidly, which can lead to difficulty with coordination, clumsiness or sudden weakness. Mental fatigue may also make ...
Fatigue in a medical context is used to cover experiences of low energy that are not caused by normal life. [2] [3]A 2021 review proposed a definition for fatigue as a starting point for discussion: "A multi-dimensional phenomenon in which the biophysiological, cognitive, motivational and emotional state of the body is affected resulting in significant impairment of the individual's ability to ...
exercise-induced rhabdomyolysis Exertional rhabdomyolysis ( ER ) is the breakdown of muscle from extreme physical exertion. It is one of many types of rhabdomyolysis that can occur, and because of this, the exact prevalence and incidence are unclear.