The primary study endpoint is VO2peak and secondary endpoints include : Six-minute walk distance ( 6MWD ) , one-repetition-maximum ( 1RM ) , pulmonary function , patient-reported outcomes ( PROs ) on health-related quality of life ( HRQoL ) , symptoms and side effects of the cancer disease and the treatment of the disease , anxiety , depression , wellbeing , lifestyle , hospitalization time , sick leave , work status , postoperative complications ( up to 30 days after surgery ) and survival .