61. |
|
|
62. |
- Eliason, Gabriella, et al.
(författare)
-
Physical performance and muscular characteristics in different stages of COPD
- 2009
-
Ingår i: Scandinavian Journal of Medicine and Science in Sports. - : Wiley-Blackwell Publishing Inc.. - 0905-7188 .- 1600-0838. ; 19:6, s. 865-870
-
Tidskriftsartikel (refereegranskat)abstract
- This study has examined exercise capacity and muscle morphology in patients with different severities of chronic obstructive pulmonary disease (COPD). Twenty-three patients and 12 healthy matched controls were recruited. Based on the severity of airflow obstruction, patients were divided into two subgroups. Exercise capacity was determined using a 6-min walk test. Muscle fiber composition, fiber area and number of satellite cells/muscle fiber were determined in muscle biopsies using immunohistochemistry. A progressive decline in exercise capacity was noted with ascending disease severity. Furthermore, a correlation between reduction in exercise capacity and changes in muscle fiber composition was observed in COPD. The group with severe and very severe COPD had a lower proportion of type I and a higher proportion of type IIa fibers compared with the other groups. In severe and very severe COPD, a reduction in fiber area of type IIa fibers was also seen. The number of satellite cells/muscle fiber did not differ between the groups. In conclusion, a decline in exercise capacity occurs already in mild and moderate COPD, indicating that the 6-min walk test is a reliable indicator of disease severity. Furthermore, changes in skeletal muscle morphology are associated with disease severity while muscle regenerative capacity is not altered.
|
|
63. |
|
|
64. |
|
|
65. |
|
|
66. |
|
|
67. |
|
|
68. |
|
|
69. |
|
|
70. |
|
|