Effect of StRess and ExeRcize on the Outcome After Chemo-Radiation

Patients will wear the smartwatch during treatment which measures, activity, steps, sleep and heartrate

Level of cortisol in serum will be determined

Patients are asked to fill in patient reported outcomes (PROMS) and specific questions on stress, exercise and fatigue (QSC-R23, IPAQ-SF, MVI-20)