Obese patients are known to have increased work of breathing inducing dyspnea, exercise intolerance and impaired quality of life. Respiratory muscle training is known to increase respiratory muscle capacity, reduce dyspnoea and improve exercise performance in healthy subjects and respiratory patients. The investigators hypothesized that Respiratory muscle training would reduce dyspnoea, increase exercise tolerance and quality of life in obese patients.

Inclusion Criteria:

• Obese patients (BMI > 30 kg/m2), without respiratory pathology (VEMS > 80% predicted, VEMS/CV > 80%)
• men or women
• age between 18 and 60 years old

Exclusion Criteria:

• Respiratory, cardiovascular, musculoskeletal diseases
• Alcoholism