Idiopathic Pulmonary Fibrosis (IPF) and the 3 Minutes Sit-to-stand Test (ST2-IPF)

Assessment of the Reproducibility of the 3 Minutes Sit-to-stand Test in Patients With Idiopathic Pulmonary Fibrosis (IPF)

This study is designed to evaluate the reproductibility and the performance of the 3 minutes sit-to-stand test in patients with idiopathic pulmonary fibrosis. To do this, the investigators are recruiting 40 patients with idiopathic pulmonary fibrosis in 2 centers (Grenoble university hospital and Lyon university hospital). Patients had to achieve an effort test on a cycle ergometer. 2 visits are planned in the hospital. During each visit, patients will perform a 3 minutes sit-to-stand test, a 1 minute sit-to-stand test and a 6 minutes walk test. During the second visit, patients will also perform a 3 minutes sit-to-stand test with measurement of oxygen uptake. The investigators will then analyse the results by comparing numbers of cycle, functional response and symptoms during the 3 minutes sit-to-stand test of the 2 visits. The investigators will also compare the functional response obtained during the 3 minutes sit-to-stand test, the 1 minute sit-to-stand test and the 6 minutes walk test. Finally, the investigators will compare the maximal values of oxygen uptake, respiration rate and expired volume obtained during the 3 minutes sit-to-stand test to the effort test on cycle ergometer.

The investigators want to test the reproductibility of a 3 minutes sit-to-stand test in patients with idiopathic pulmonary fibrosis. For this, patient perform the test during 2 visits and the investigators are going to compare the results of the two visits.

6 minutes walk test, 1 minute sit-to-stand test, 3 minutes sit-to-stand test with oxygen uptake measurement

3 minutes sit-to-stand test, 1 minute sit-to-stand test, 6 minutes walk test will be performed 2 times for each patients 3 minutes sit-to-stand test with oxygen uptake measurement will be performed one time for each patient

Evaluate the reproductibility for the number of rise and down during the 3 minutes sit-to-stand test of the 2 visits (the investigators will compare the number of rise and sit during the 3 minutes sit-to-stand test of the 2 visits to see if they are similar)

Evaluate the reproductibility of functional response (oxygen saturation) during the 3 minutes sit-to-stand test

Evaluate the reproductibility of functional response (heart rate) during the 3 minutes sit-to-stand test

Evaluate the reproductibility of functional response (symptoms) during the 3 minutes sit-to-stand test

Inclusion Criteria: man or woman aged less than 85 years patients with Idiopathic Pulmonary Fibrosis without any acute exacerbation during 4 months before the inclusion Non-opposition to participation in research Patient with 6 minutes walk test > 200 meters (with or without oxygen therapy) Exclusion Criteria: Patient with reduced locomotor activity, or joint pain that compromises the performance of the tests Patient with 6 minutes walk test < 200 meters Patient with an other etiology of pulmonary fibrosis Other significant pulmonary diseases Patient with unstable cardiac disease Patient who may be, according to the investigator's assessment, not cooperating or respecting the obligations inherent in participating to the study. Opposition to participation in research

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