Please select the eligibility criteria that correspond to the clinical trial below.
Title: The Effects of a Physical Activity Counseling Program Immediately After an Exacerbation in Patients With COPD.
Brief Summary: Severe exacerbations are prevalent in a subgroup of patients with COPD and generally warrant a hospitalization. During the hospitalization, patients are extremely physically inactive with only a limited recovery one month after discharge. Physical inactivity is associated with negative health benefits. Therefore intervening in the period after and exacerbation seems useful to improve the levels of physical activity. Physical activity counseling and real-time feedback have already been applied in stable patients with COPD, with beneficial effects.The present study will investigate whether this specific intervention will help to improve the activity level in patients after an acute exacerbation. Further we investigated the effects of the intervention on improvements in functional exercise capacity.


Options:
A: Inclusion Criteria:

* patients hospitalized for exacerbation of COPD

Exclusion Criteria:

* patients presenting change in mental status (confusion, lethargy or coma)
* persistence or worsening in hypoxemia (PaO2\<40mmHg) and/or respiratory acidosis (pH\<7.25) despite oxygen supplementation or use of non-invasive ventilation
* hemodynamic instability requiring vasoactive drugs
* patients transferred to ICU
* hospitalization lower than 5 days
* diseases that prevented the exercises
B: Inclusion Criteria:

* age \> 45 years
* COPD diagnosed by pulmonary function tests during clinical stability, with a ratio of forced expiratory volume in one second (FEV1) to forced vital capacity (FVC) ≤ 0.70
* clinical stability, defined as at least 4 weeks without antibiotics or oral corticosteroids.

Exclusion Criteria:

* living \>6 months/year outside of the included municipalities,
* living to a distance higher than 500 meters to any of the urban trails used for the study,
* mental disability according to the Mini Mental State Examination in its validated Spanish version
* comorbidity that could interfere with study tests (e.g., lower limb amputation)
* severe psychiatric disease or severe comorbidity limiting survival at one year, according to medical history.
C: Inclusion criteria:

For COPD subjects: Male or female, age of 40 years or older, smoking history \>10 pack-years, symptomatic defined as baseline dyspnea index focal score of 9 or more and / or daily cough with production of sputum for three months per year during at least two consecutive years, diagnosis of early stage COPD according to: post-bronchodilator FEV1/FVC ratio \<70%., FEV1 \>/=50% post-bronchodilator predicted normal, and a decreased Inspiratory Capacity during exercise. For Age / Gender Matched Controls: Male or female, age of 40 years or older, nonsmoker, with no significant diseases.

Exclusion criteria:

Patients with a significant disease other than COPD; a significant disease is defined as a disease which, in the opinion of the investigator, may (i) put the patient at risk because of participation in the study, (ii) influence the results of the study, or (iii) cause concern regarding the patient's ability to participate in the study.

Patients with a history of asthma, Patients requiring the use of supplemental oxygen therapy, Patients who have a limitation of exercise performance as a result of factors other than fatigue or exertional dyspnoea, such as arthritis in the leg, angina pectoris, claudication or other conditions, or Patients with contraindications to exercise.

Note: Additional exclusion criteria for Age / Gender Matched Controls: Patients with a significant disease including COPD.
D: Inclusion Criteria:

* Signed Informed Consent
* Chronic Obstructive Lung Disease (Tiff\<70%)
* Hospitalized because of exacerbation
* Capable of working with electronic devices

Exclusion Criteria:

* Orthopedic/Neurologic problems making it difficult to be active
* Participation in a rehabilitation program

Answer: D