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Muscle fatigue is when muscles that were initially generating a normal amount of force, then experience a declining ability to generate force. It can be a result of vigorous exercise, but abnormal fatigue may be caused by barriers to or interference with the different stages of muscle contraction. There are two main causes of muscle fatigue ...
While most muscle cramps occur due to idiopathic (unknown) causes, they are often linked with factors such as exercise, muscle overuse, straining, and diet. Muscle cramps can also occur in people ...
The symptoms of rhabdomyolysis depend on its severity and whether kidney failure develops. Milder forms may not cause any muscle symptoms, and the diagnosis is based on abnormal blood tests in the context of other problems. More severe rhabdomyolysis is characterized by muscle pain, tenderness, weakness and swelling of the affected muscles. [10]
The American TV show, Diagnosis, in episode 1 Detective Work, an athletic 23-year-old nursing student, Angel Parker, experiences episodes of extreme muscle fatigue, pain and cramping after prolonged exercise, sometimes followed by dark urine (myoglobinuria) and elevated CK (rhabdomyolysis). These episodes can leave her immobile for hours.
The process of rhabdomyolysis also releases myoglobin into the blood, which will eventually end up in the urine and cause it to become red or brown: another condition known as myoglobinuria. [16] Some other common symptoms are exercise intolerance, which consists of fatigue, muscle pain, and cramps during exercise, and skin rashes.
Cramp. A cramp is a sudden, involuntary, painful skeletal muscle contraction [1][2] or overshortening associated with electrical activity; [3] while generally temporary and non-damaging, they can cause significant pain and a paralysis -like immobility of the affected muscle. A cramp usually goes away on its own over a period of several seconds ...
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). Myoglobin is the protein released into the bloodstream when skeletal muscle is broken down.
Muscle weakness. Muscle weakness is a lack of muscle strength. Its causes are many and can be divided into conditions that have either true or perceived muscle weakness. True muscle weakness is a primary symptom of a variety of skeletal muscle diseases, including muscular dystrophy and inflammatory myopathy. It occurs in neuromuscular junction ...