Muscular weakness

Name(s): 
Poor muscle tone
Muscle weakness
Low muscle tone
Nature

Weakness is a symptom of a number of different conditions. 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. It occurs in neuromuscular junction disorders, such as myasthenia gravis.

Source: Wikipedia

Incidence 
People that are bedridden lose over 80% of their muscle strength during a four to five month period.
Type 
(G) Very specific problems