Patients in this arm follow a lifestyle counseling programme starting from diagnosis up to 6 months postoperatively.

Patients in this arm follow usual care.

A personalized lifestyle counseling programme.

To estimate patient recruitment/consent rate to the prehabilitation/rehabilitation group Enrolment logs will be recorded for all patients who meet the eligibility criteria. Reasons for non-participation will be recorded. We define a success criterion of 40% of the total number of participants invited to be recruited to the pilot study.

To estimate patient attendance, measured by the number of sessions attended out of 10. Reasons for non-attendance will be collected and withdrawals tracked. We will consider an attendance rate of 80% satisfactory

To estimate patient adherence monitored with the aid of the wearables. Adherence is defined as at least 150 min of moderate intensity exercise and at least two strength training sessions per week. Exercise instructions are based on the Health Council's exercise guidelines. We will consider an adherence of 70% as satisfactory.

To estimate the number of withdrawals, defined as the proportion of patients who quit the intervention before reaching the primary endpoint (HRQOL at six months after surgery). Information about the reasons for withdrawal will be collected.

To estimate patient satisfaction with the programme assessed during three interviews: at four weeks, at three months after surgery and at the end of the study. Satisfaction is defined as: satisfaction with the lifestyle coach, satisfaction with the duration of the intervention, satisfaction with the physical training programme. Patients will be given room for their own input to improve the intervention.

To investigate likely changes in the primary outcome measure HRQOL measured with the EORTC-QLQ-30 questionnaire at six months after surgery.