Pilot study to evaluate the effect of prehabilitation programme through a mobile application PREHapp in colon cancer surgery. The objectives of this pilot study were to evaluate the usability of the PREHapp for people undergoing colon cancer surgery, estimate the effect of the app on functional recovery after surgery and to evaluate complications during the postoperative period after 4 weeks of follow-up.

Inclusion Criteria:

• Age greater than or equal to 18 years.
• Diagnosis of resectable colon cancer with elective surgery.
• Participants have at least 2 weeks to their operation date.
• Agree to collaborate in the study and sign the informed consent

Exclusion Criteria:

• Diagnosis of unresectable colon cancer.
• Inability to follow the prehabilitation programme.
• Participants be able to understand written and spoken Spanish.
• Subjects with previous nutritional supplements.
• Pre-anesthetic evaluation with results, according to the classification of the American Society of Anesthesiologists (ASA) IV or V.

The study population is made up of patients scheduled for colon surgery due to malignant pathology at the General Hospital of Elche. Patients must be 18 years of age or older, have an Android smartphone, and accept the prehabilitation program.