Patients with chronic obstructive pulmonary disease (COPD) are at increased risk of osteoporosis and fractures. Osteoporosis, however, may be equally as disabling as COPD, and may impair respiratory function even further if the patient experiences vertebral compressions.

In this study, we will survey the prevalence, correlations and effectiveness of intervention of osteoporosis in COPD patients.

COPD has a multiple etiology and organ impaired inflammatory disease. In clinical characteristic include airway inflammatory response, cili mobility impairment and lung consolidation change; the others change includes: other functional impairments such as malnutrition, body mass loss, osteogenesis and osteoporosis. The prevalence of osteoporosis and osteopenia patients is generally higher than in healthy subjects and some other chronic disease. Patients with chronic obstructive pulmonary disease are at increased risk of osteoporosis and fractures. Risk factors such as smoking, advanced age, physical inactivity, malnutrition, and low weight may be responsible, but a number of pathophysiological explanations including the presence of a chronic inflammatory state with increased levels of proinflammatory cytokines and protein catalytic enzymes may also be involved. The use of oral glucocorticoids is also a significant risk factor. Osteoporosis, however, may be equally as disabling as COPD, and may impair respiratory function even further if the patient experiences vertebral compressions and loss of height The number of patients with osteoporosis is rising and osteoprosis becomes an important medical and public health issue as the population gets older including Taiwan. Osteoporosis is a silent disease and it is thus important to screen for osteoporosis institute treatment an dreduce fracture incidence. In this study, we will survey the prevalence, correlations and effectiveness of intervention of osteoporosis in COPD patients. This study purpose hope can understand patient's osteoporosis status, pulmonary function impairment and exercise intolerance. Then, we may be can prevent the unnecessary of fracture and maintance of bone mineral contains by the pulmonary rehabilitation program training in osteoporosis COPD patients.

Inclusion Criteria:

• with chronic obstructive pulmonary disease.
• with osteoporosis.

Exclusion Criteria:

• could not receive six-minutes walking test.
• could not receive mobile-based pulmonary rehabilitation.
• acute exacerbation of COPD recent 3 months.