Physical Activity During Chemo- and/or Immunotherapy for Lung Cancer

The main goal of this trial is to describe the pattern of physical activity in patients with non-small cell lung cancer during chemo- and/or immunotherapy, to evaluate potential predictors of those patterns and to assess potential correlations with patient reported outcomes (pain-, distress-, and fatigue scores). To reach this goal, this trial will be first trial in which the mean number of steps per week performed at baseline and during each week of chemo- and or immunotherapy will be collected in a standardized prospective way. The trial is exploratory in nature with the aim to generate scientific hypotheses to be investigated in future clinical trials.