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2. Aging movement control - Wikipedia

   en.wikipedia.org/wiki/Aging_movement_control

   By the age of 70, these losses occur in both proximal and distal muscles. In biceps brachii and brachialis, old adults show decreased strength (by 1/3) correlated with a reduction in the number of motor units (by 1/2). Old adults show evidence that remaining motor units may become larger as motor units innervate collateral muscle fibers. [2]

3. Muscle fatigue - Wikipedia

   en.wikipedia.org/wiki/Muscle_fatigue

   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 ...

4. Complications of prolonged standing - Wikipedia

   en.wikipedia.org/wiki/Complications_of_prolonged...

   Muscles kept in a constant stress position quickly become exhausted and can result in pain and swelling in the lower back, legs, ankles and feet. [10] [11] The Occupational Safety and Health Administration (OSHA) has stated that muscle fatigue and musculoskeletal disorders account for "33% of all worker injury and illness". [12]

5. Neuromyotonia - Wikipedia

   en.wikipedia.org/wiki/Neuromyotonia

   NMT is a diverse disorder. As a result of muscular hyperactivity, patients may present with muscle cramps, stiffness, myotonia-like symptoms (slow relaxation), associated walking difficulties, hyperhidrosis (excessive sweating), myokymia (quivering of a muscle), fasciculations (muscle twitching), fatigue, exercise intolerance, myoclonic jerks and other related symptoms.

6. Neuromuscular disease - Wikipedia

   en.wikipedia.org/wiki/Neuromuscular_disease

   Symptoms of neuromuscular disease may include numbness, paresthesia, muscle atrophy, a pseudoathletic appearance, exercise intolerance, myalgia (muscle pain), fasciculations (muscle twitches), myotonia (delayed muscle relaxation), hypotonia (lack of resistance to passive movement), fixed muscle weakness (a static symptom), or premature muscle ...

7. Metabolic myopathy - Wikipedia

   en.wikipedia.org/wiki/Metabolic_myopathy

   The need for ATP in muscle cells is illustrated by the phenomenon of Rigor mortis, which is the muscle rigidity that occurs in dead bodies for a short time after death. In these muscles, all the ATP has been used up and in the absence of further ATP being generated, the calcium transport proteins stop pumping calcium ions into the sarcoplasmic ...

8. ‘I Started Working Out At 71. A Year Later, 50 Percent Of My ...

   www.aol.com/started-working-71-later-50...

   Here's how she converted 50 percent of her body weight into muscle. ... As I watched her over the years, I feared I’d end up in the same boat. ... but I also moved far away from my friends a few ...

9. Frailty syndrome - Wikipedia

   en.wikipedia.org/wiki/Frailty_syndrome

   Frailty or frailty syndrome refers to a state of health in which older adults gradually lose their bodies' in-built reserves and functioning. This makes them more vulnerable, less able to recover and even apparently minor events (infections, environmental changes) can have drastic impacts on their physical and mental health.