The apparent lack of a damage initiation stage may account for the low endurance limit reported.
Coatings that show excellent performance in fretting tests have shown a low endurance in pin-on-disk tests.
However, one crucial disadvantage of the French tanks, considered as a very broad whole, was their low endurance.
These children exhibit weakness [ 3- 7] and low endurance [ 8- 12].
Frailty is thought to lead to disability and subsequent falls due to weakness and low endurance.
23 Changes in muscle-fiber types are characterized by a decrease in oxidative type I fibers and increased type II fibers, less insulin sensitivity, and low endurance.
Hence, low muscular strength is a predictor for work disability in home care workers [ 12] and low endurance of back muscles is a predictor for first time occurrence of low back pain in men [ 56].
Indeed, low maximal oxygen consumption (V o2max) and low endurance capacity are stronger predictors of early morbidity and mortality relative to other established risk factors, such as diabetes or hypertension (1, 2).
Type I fibers are characterized by low force/power/speed production and high endurance, Type II b and Type II x fibers are characterized by high force/power/speed production and low endurance, while Type II a fibers fall in between [ 26].
One study of moderate quality found an association between low endurance of the back extensors and poor outcome of return to work (disability pension), and between high endurance of back extensors and poor outcome of back pain but no association with leg pain, disability or global improvement [ 27].
Inflammatory myopathies (IM) comprise a group of heterogeneous muscle diseases that share key common characteristics including in particular muscle weakness, low endurance [ 1], tissue infiltration by inflammatory cells [ 2– 4], and myofiber necrosis/regeneration with an increase of creatine phosphokinase (CPK) serum levels during acute phases of the disease [ 5].
