Goals The acceptability and feasibility of a 3-month personalised lifestyle (diet, exercise and weight management) intervention in overweight adults who had completed curative treatment for colorectal cancer were assessed by qualitative interviews, quality-of-life questionnaires and subjective and objective measures of diet and activity. Main results Over a 4-month period, 28 of 37 (75%) patients met the inclusion criteria and 20 (71%) of the eligible patients agreed to participate in the study and 18 (90%) completed the 3-month study. Reported adherence related to tailored advice, personalised feedback and family support. Reported barriers included time following surgery, fatigue, having a stoma or chronic diarrhoea and conflicting advice from clinicians. A weight change of -1.2 (±4.4) kg was achieved overall and -4.1 (±3.7) kg in the ten who had lost weight. Conclusions Colorectal cancer survivors will participate in a lifestyle change initiative. Interventions should be personalised to suit abilities, provide feedback on personal goals and encourage social support. Intervention timing and attaining greater support from clinicians should be explored prior to the development of an efficacy trial. © Springer-Verlag 2009.