Inclusion Criteria:

- Histologically or cytologically confirmed metastatic lung cancer or gastrointestinal
cancer

- WHO performance status 0, 1 or 2

- Able to walk at least 100 meters independently without crutches or walking frame
assessed by the treating physician on the basis of the patient's history and physical
condition

- Receiving palliative treatment

Exclusion Criteria:

- Enteral and/or parenteral nutrition within 1 month previous to study participation

- History of ileus within one month

- Known brain metastases or symptomatic bone metastases

- Psychiatric disorder precluding understanding of information on trial related topics
and giving informed consent.

- Any serious underlying medical condition which could impair the ability of the
patient to participate in the trial