EDICT - Exercise inDuced Changes In Colorectal Cancer Tissues

Inclusion Criteria: * Colorectal cancer confirmed by histology * Considered fit for surgery by surgical and anaesthetic team * Considered fit for physical activity programme by MDT * Age ≥ 18 years * BMI ≥ 26 kg/m2 * Not pregnant * Non obstructing cancer * Able to provide written informed consent * Patients not having neoadjuvant chemotherapy Exclusion Criteria: * Receiving hormone therapy * Patients with diabetes * Patients currently on either a dietary or exercise programme reflective of the World Cancer Research Fund Guidelines. * Cardiac or renal impairment * Excessive use of laxatives * History of eating disorders * Patients with inflammatory bowel disorders/coeliac * Strong family history/polyposis (i.e. more than one 1st degree relative \<55yrs) * Patients with previous or concurrent malignancies