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

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

   I experimented with different types of classes to find out what I enjoyed, and I worked with a few different trainers to guide me with strength training before going solo. Now, at 75, I go to the ...

4. 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 ...

5. The Menopause Symptom I Didn't See Coming and How I Got ...

   www.aol.com/menopause-symptom-didnt-see-coming...

   Research suggests that over half of women going through menopause experience musculoskeletal symptoms, including frozen shoulder. Not to mention that we all gradually lose muscle mass as we age ...

6. Inclusion body myositis - Wikipedia

   en.wikipedia.org/wiki/Inclusion_body_myositis

   Weakness comes on slowly (over months to years) in an asymmetric manner and progresses steadily, leading to severe weakness and wasting of arm and leg muscles. IBM is more common in men than women. [10] Patients may become unable to perform activities of daily living and most require assistive devices within 5 to 10 years of symptom onset.

7. Complications of prolonged standing - Wikipedia

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

   Research has shown that the body experiences muscle fatigue after standing for five hours; this fatigue persists for more than 30 minutes after the end of the work day according to electronic measurements of fatigue. [13] The perception of fatigue is subjective and does not necessarily correlate with the experimental indicators of fatigue.

8. Weakness - Wikipedia

   en.wikipedia.org/wiki/Weakness

   Weakness is a symptom of many different medical conditions. [1] The causes are many and can be divided into conditions that have 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.

9. Sarcopenia - Wikipedia

   en.wikipedia.org/wiki/Sarcopenia

   There are many proposed causes of sarcopenia and it is likely the result of multiple interacting factors. Understanding of the causes of sarcopenia is incomplete, however, changes in hormones, immobility, age-related muscle changes, nutrition, and neurodegenerative changes have all been recognized as potential causative factors.