Free fat mass , pulmonary function , time to exercise tolerance ( Tlim ) , 6-min walk test distance ( 6-MWTD ) , tumor necrosis factor ( TNF - ) and - endorphin levels , Borg dyspnea and leg score ( BDS and BLS ) and quality of life by the St. George 's Respiratory Questionnaire score ( SGRQ ) were examined before and after the intervention .